# Math Puzzle 32

This math puzzle 32 is on Probability,Percentage,median,volume of cone etc.**1) Peter sells a camera to Ron at a loss of 15%. Ron sells the same camera to David at a profit of 20%. If David paid $153 for the camera, how much did Peter pay for it?**

A. 150 B. 160 C. 175 D. 200 E. 210

**2) If a grain of rice is placed on the first square of a chess board, 2 on the second, 4 on the next and so on, how many grains will be needed for the 64th square**

A. 128 B. 2

^{32}C. 2

^{63}D. 2

^{64}E. 2084

**3) A box contains 5 red, 4 white and 6 blue balls. If two balls are drawn at random and the first is not replaced before the second is drawn, what is the probability that both are white?**

A. 4/15 B. 2/35 C. 3/14 D. 4/75 E. 3/4

**4) Which of the following can be calculated for the set of numbers 2, 3, 3, 4, 6, x, 11 where 7 < x <10?**

A. Mean B. Median C. Mean, Median, Mode D. Median, Mode E. None

**5) Each angle of polygon is 165 0 . The number of its sides is**

A. 9 B. 12 C. 15 D. 24 E. 25

**6) The volume of a cone of radius r is 1/3 of the volume of a cube of length x. If the cube and cone have equal heights, then what is r in terms of x?**

A. x

^{2}B. x C. x √ π D. x /√ π E. x / π

**7) If Andy, Bob and Cathy split $15.00 in the ratio 1:2:3, how much will Bob get?**

A. $ 2.00 B. $ 2.50 C. $ 3.00 D. $ 5.00 E. $ 7.50

**8)Which of the choice is same as 35%?**

A. 0.035 B. 3.5 C. 7/20 D. 7/10 E. 35/1000

**9) For what value of 'n' is the value of n(n-4)(n+1) negative?**

A. -1 B. 0 C. 1 D. 4 E. 7

**10) If x + y + z = 20, y = 3x and z = 2y then what is x?**

A. -4 B. 3 C. 2 D. 4 E. 6

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