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| − | 1 A chord which is the perpendicular bisector of a radius of length 12 in a circle, has length
| + | '''1973 [[AHSME]]''' problems and solutions. The first link contains the full set of test problems. The rest contain each individual problem and its solution. |
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| − | <math> \textbf{(A)}\ 3\sqrt3\qquad\textbf{(B)}\ 27\qquad\textbf{(C)}\ 6\sqrt3\qquad\textbf{(D)}\ 12\sqrt3\qquad\textbf{(E)}\ \text{ none of these} </math>
| + | *[[1973 AHSME Problems|Entire Exam]] |
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| + | *[[1973 AHSME/Answer Key|Answer Key]] |
| − | 2 One thousand unit cubes are fastened together to form a large cube with edge length 10 units; this is painted and then separated into the original cubes. The number of these unit cubes which have at least one face painted is | + | **[[1973 AHSME Problems/Problem 1|Problem 1]] |
| − | | + | **[[1973 AHSME Problems/Problem 2|Problem 2]] |
| − | <math> \textbf{(A)}\ 600\qquad\textbf{(B)}\ 520\qquad\textbf{(C)}\ 488\qquad\textbf{(D)}\ 480\qquad\textbf{(E)}\ 400 </math>
| + | **[[1973 AHSME Problems/Problem 3|Problem 3]] |
| − | | + | **[[1973 AHSME Problems/Problem 4|Problem 4]] |
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| + | **[[1973 AHSME Problems/Problem 5|Problem 5]] |
| − | 3 The stronger Goldbach conjecture states that any even integer greater than 7 can be written as the sum of two different prime numbers. For such representations of the even number 126, the largest possible difference between the two primes is | + | **[[1973 AHSME Problems/Problem 6|Problem 6]] |
| − | | + | **[[1973 AHSME Problems/Problem 7|Problem 7]] |
| − | <math> \textbf{(A)}\ 112\qquad\textbf{(B)}\ 100\qquad\textbf{(C)}\ 92\qquad\textbf{(D)}\ 88\qquad\textbf{(E)}\ 80 </math>
| + | **[[1973 AHSME Problems/Problem 8|Problem 8]] |
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| + | **[[1973 AHSME Problems/Problem 9|Problem 9]] |
| − | 4 Two congruent -- are placed so that they overlap partly and their hypotenuses coincide. If the hypotenuse of each triangle is 12, the area common to both triangles is | + | **[[1973 AHSME Problems/Problem 10|Problem 10]] |
| − | | + | **[[1973 AHSME Problems/Problem 11|Problem 11]] |
| − | <math> \textbf{(A)}\ 6\sqrt3\qquad\textbf{(B)}\ 8\sqrt3\qquad\textbf{(C)}\ 9\sqrt3\qquad\textbf{(D)}\ 12\sqrt3\qquad\textbf{(E)}\ 24 </math>
| + | **[[1973 AHSME Problems/Problem 12|Problem 12]] |
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| + | **[[1973 AHSME Problems/Problem 13|Problem 13]] |
| − | 5 Of the following five statements, I to V, about the binary operation of averaging (arithmetic mean), | + | **[[1973 AHSME Problems/Problem 14|Problem 14]] |
| − | | + | **[[1973 AHSME Problems/Problem 15|Problem 15]] |
| − | I. Averaging is associative
| + | **[[1973 AHSME Problems/Problem 16|Problem 16]] |
| − | II. Averaging is commutative
| + | **[[1973 AHSME Problems/Problem 17|Problem 17]] |
| − | III. Averaging distributes over addition
| + | **[[1973 AHSME Problems/Problem 18|Problem 18]] |
| − | IV. Addition distributes over averaging
| + | **[[1973 AHSME Problems/Problem 19|Problem 19]] |
| − | V. Averaging has an identity element
| + | **[[1973 AHSME Problems/Problem 20|Problem 20]] |
| − | | + | **[[1973 AHSME Problems/Problem 21|Problem 21]] |
| − | those which are always true are
| + | **[[1973 AHSME Problems/Problem 22|Problem 22]] |
| − | | + | **[[1973 AHSME Problems/Problem 23|Problem 23]] |
| − | <math> \textbf{(A)}\ \text{All}\qquad\textbf{(B)}\ \text{I and II only}\qquad\textbf{(C)}\ \text{II and III only}\qquad\textbf{(D)}\ \text{II and IV only}\qquad\textbf{(E)}\ \text{II and V only} </math>
| + | **[[1973 AHSME Problems/Problem 24|Problem 24]] |
| − | | + | **[[1973 AHSME Problems/Problem 25|Problem 25]] |
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| + | **[[1973 AHSME Problems/Problem 26|Problem 26]] |
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| + | **[[1973 AHSME Problems/Problem 27|Problem 27]] |
| − | 6 If 554 is the base representation of the square of the number whose base representation is 24, then , when written in base 10, equals | + | **[[1973 AHSME Problems/Problem 28|Problem 28]] |
| − | | + | **[[1973 AHSME Problems/Problem 29|Problem 29]] |
| − | <math> \textbf{(A)}\ 6\qquad\textbf{(B)}\ 8\qquad\textbf{(C)}\ 12\qquad\textbf{(D)}\ 14\qquad\textbf{(E)}\ 16 </math>
| + | **[[1973 AHSME Problems/Problem 30|Problem 30]] |
| − | | + | **[[1973 AHSME Problems/Problem 31|Problem 31]] |
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| + | **[[1973 AHSME Problems/Problem 32|Problem 32]] |
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| + | **[[1973 AHSME Problems/Problem 33|Problem 33]] |
| − | 7 The sum of all integers between 50 and 350 which end in 1 is | + | **[[1973 AHSME Problems/Problem 34|Problem 34]] |
| − | | + | **[[1973 AHSME Problems/Problem 35|Problem 35]] |
| − | <math> \textbf{(A)}\ 5880\qquad\textbf{(B)}\ 5539\qquad\textbf{(C)}\ 5208\qquad\textbf{(D)}\ 4877\qquad\textbf{(E)}\ 4566 </math>
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| − | 8 If 1 pint of paint is needed to paint a statue 6 ft. high, then the number of pints it will take to paint (to the same thickness) 540 statues similar to the original but only 1 ft. high is | |
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| − | <math> \textbf{(A)}\ 90\qquad\textbf{(B)}\ 72\qquad\textbf{(C)}\ 45\qquad\textbf{(D)}\ 30\qquad\textbf{(E)}\ 15 </math>
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| − | 9 In with right angle at , altitude and median trisect the right angle. If the area of is , then the area of is | |
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| − | <math> \textbf{(A)}\ 6K\qquad\textbf{(B)}\ 4\sqrt3\ K\qquad\textbf{(C)}\ 3\sqrt3\ K\qquad\textbf{(D)}\ 3K\qquad\textbf{(E)}\ 4K </math>
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| − | 10 If is a real number, then the simultaneous system | |
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| − | <math> nx+y = 1 </math>
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| − | <math> \textbf{(A)}\ -1\qquad\textbf{(B)}\ 0\qquad\textbf{(C)}\ 1\qquad\textbf{(D)}\ 0\text{ or }1\qquad\textbf{(E)}\ \frac{1}2 </math>
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| − | 11 A circle with a circumscribed and an inscribed square centered at the origin of a rectangular coordinate system with positive and axes and is shown in each figure to below.
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| − | <asy>
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| − | size((400));
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| − | draw((0,0)--(22,0), EndArrow);
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| − | draw((10,-10)--(10,12), EndArrow);
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| − | draw((25,0)--(47,0), EndArrow);
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| − | draw((35,-10)--(35,12), EndArrow);
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| − | draw((-25,0)--(-3,0), EndArrow);
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| − | draw((-15,-10)--(-15,12), EndArrow);
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| − | draw((-50,0)--(-28,0), EndArrow);
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| − | draw((-40,-10)--(-40,12), EndArrow);
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| − | draw(Circle((-40,0),6));
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| − | draw(Circle((-15,0),6));
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| − | draw(Circle((10,0),6));
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| − | draw(Circle((35,0),6));
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| − | draw((-34,0)--(-40,6)--(-46,0)--(-40,-6)--(-34,0)--(-34,6)--(-46,6)--(-46,-6)--(-34,-6)--cycle);
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| − | draw((-6.5,0)--(-15,8.5)--(-23.5,0)--(-15,-8.5)--cycle);
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| − | draw((-10.8,4.2)--(-19.2,4.2)--(-19.2,-4.2)--(-10.8,-4.2)--cycle);
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| − | draw((14.2,4.2)--(5.8,4.2)--(5.8,-4.2)--(14.2,-4.2)--cycle);
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| − | draw((16,6)--(4,6)--(4,-6)--(16,-6)--cycle);
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| − | draw((41,0)--(35,6)--(29,0)--(35,-6)--cycle);
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| − | draw((43.5,0)--(35,8.5)--(26.5,0)--(35,-8.5)--cycle);
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| − | label("I", (-49,9));
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| − | label("II", (-24,9));
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| − | label("III", (1,9));
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| − | label("IV", (26,9));
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| − | label("X", (-28,0), S);
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| − | label("X", (-3,0), S);
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| − | label("X", (22,0), S);
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| − | label("X", (47,0), S);
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| − | label("Y", (-40,12), E);
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| − | label("Y", (-15,12), E);
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| − | label("Y", (10,12), E);
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| − | label("Y", (35,12), E);</asy>
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| − | The inequalities
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| − | <cmath> |x|+|y|\leq\sqrt{2(x^{2}+y^{2})}\leq 2\mbox{Max}(|x|, |y|) </cmath>
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| − | are represented geometrically* by the figure numbered
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| − | <math> \textbf{(A)}\ I\qquad\textbf{(B)}\ II\qquad\textbf{(C)}\ III\qquad\textbf{(D)}\ IV\qquad\textbf{(E)}\ \mbox{none of these} </math>
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| − | *An inequality of the form , for all and is represented geometrically by a figure showing the containment | |
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| − | 12 The average (arithmetic mean) age of a group consisting of doctors and lawyers in 40. If the doctors average 35 and the lawyers 50 years old, then the ratio of the numbers of doctors to the number of lawyers is
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| − | <math> \textbf{(A)}\ 3: 2\qquad\textbf{(B)}\ 3: 1\qquad\textbf{(C)}\ 2: 3\qquad\textbf{(D)}\ 2: 1\qquad\textbf{(E)}\ 1: 2 </math>
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| − | 13 The fraction is equal to
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| − | <math> \frac{2(\sqrt2+\sqrt6)}{3\sqrt{2+\sqrt3}} </math>
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| − | 14 Each valve , , and , when open, releases water into a tank at its own constant rate. With all three valves open, the tank fills in 1 hour, with only valves and open it takes 1.5 hours, and with only valves and open it takes 2 hours. The number of hours required with only valves and open is
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| − | <math> \textbf{(A)}\ 1.1\qquad\textbf{(B)}\ 1.15\qquad\textbf{(C)}\ 1.2\qquad\textbf{(D)}\ 1.25\qquad\textbf{(E)}\ 1.75 </math>
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| − | 15 A sector with acute central angle is cut from a circle of radius 6. The radius of the circle circumscribed about the sector is | |
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| − | 16 If the sum of all the angles except one of a convex polygon is , then the number of sides of the polygon must be | |
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| − | 17 If is an acute angle and , then equals | |
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| − | 18 If is a prime number, then divides without remainder | |
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| − | 19 Define for and positive to be | |
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| − | where is the greatest integer for which . Then the quotient is equal to
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| − | 20 A cowboy is 4 miles south of a stream which flows due east. He is also 8 miles west and 7 miles north of his cabin. He wishes to water his horse at the stream and return home. The shortest distance (in miles) he can travel and accomplish this is | |
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| − | 21 The number of sets of two or more consecutive positive integers whose sum is 100 is | |
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| − | 22 The set of all real solutions of the inequality | |
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| − | [Note: I updated the notation on this problem.] | |
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| − | 23 There are two cards; one is red on both sides and the other is red on one side and blue on the other. The cards have the same probability (1/2) of being chosen, and one is chosen and placed on the table. If the upper side of the card on the table is red, then the probability that the under-side is also red is
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| − | 24 The check for a luncheon of 3 sandwiches, 7 cups of coffee and one piece of pie came to . The check for a luncheon consisting of 4 sandwiches, 10 cups of coffee and one piece of pie came to at the same place. The cost of a luncheon consisting of one sandwich, one cup of coffee, and one piece of pie at the same place will come to | |
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| − | 25 A circular grass plot 12 feet in diameter is cut by a straight gravel path 3 feet wide, one edge of which passes through the center of the plot. The number of square feet in the remaining grass area is | |
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| − | 26 The number of terms in an A.P. (Arithmetic Progression) is even. The sum of the odd and even-numbered terms are 24 and 30, respectively. If the last term exceeds the first by 10.5, the number of terms in the A.P. is | |
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| − | 27 Cars A and B travel the same distance. Care A travels half that distance at miles per hour and half at miles per hour. Car B travels half the time at miles per hour and half at miles per hour. The average speed of Car A is miles per hour and that of Car B is miles per hour. Then we always have | |
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| − | 28 If , , and are in geometric progression (G.P.) with and is an integer, then , , form a sequence | |
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| − | 29 Two boys start moving from the same point A on a circular track but in opposite directions. Their speeds are 5 ft. per second and 9 ft. per second. If they start at the same time and finish when they first me at the point A again, then the number of times they meet, excluding the start and finish, is | |
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| − | 30 Let denote the greatest integer where and . Then we have | |
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| − | 31 In the following equation, each of the letters represents uniquely a different digit in base ten: | |
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| − | The sum equals
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| − | 32 The volume of a pyramid whose base is an equilateral triangle of side length 6 and whose other edges are each of length is | |
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| − | 33 When one ounce of water is added to a mixture of acid and water, the new mixture is acid. When one ounce of acid is added to the new mixture, the result is acid. The percentage of acid in the original mixture is | |
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| − | 34 A plane flew straight against a wind between two towns in 84 minutes and returned with that wind in 9 minutes less than it would take in still air. The number of minutes (2 answers) for the return trip was | |
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| − | 35 In the unit circle shown in the figure, chords and are parallel to the unit radius of the circle with center at . Chords , , and are each units long and chord is units long. | |
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| − | Of the three equations
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| − | those which are necessarily true are
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| − | {{MAA Notice}}
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| | ==See Also== | | ==See Also== |
| − | {{AHSME box|year=1973|before=[[1972 AHSME]]|after=[[1974 AHSME]]}} | + | {{AHSME 30p box|year=1973|before=First AHSME, see [[1972 AHSME|1972 AHSC]]|after=[[1974 AHSME]]}} |
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| | * [[AHSME Problems and Solutions]] | | * [[AHSME Problems and Solutions]] |
| | + | * [[AMC 12 Problems and Solutions]] |
| | * [[Mathematics competitions]] | | * [[Mathematics competitions]] |
| | * [[Mathematics competition resources]] | | * [[Mathematics competition resources]] |
| | * [[Math books]] | | * [[Math books]] |
