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
Math puzzle 32
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