Math Puzzle 33
This math puzzle 33 is on radical,cyclic quadrilateral,sequence etc.1) A box contains five red marbles and seven white marbles. If one marble is drawn at random from the box, what is the probability that it is white?
A. 1/5 B. 1/7 C. 5/7 D. 5/12 E. 7/12
2) If the n th term of a sequence is given by Tn = (-1)n 2n-1 , then which of the following could be the 9th term of the sequence?
A. 256 B. 128 C. -128 D. -256 E. -512
3) In a system where there are 100 minutes in an hour and 100 seconds in a minute, how many seconds are there in an hour?
A. 3600 B. 60 C. 100 D. 10000 E. 1/100
4) If (a + 3) (a + k) = a 2 + 5a + p, then which of the following could be value of k and p?
A. k = 3, p = 3 B. k = 1, p = 6 C. k = 2, p = 6
D. k = 2, p = 5 E. k = -2, p = -6
5) A box of chocolates contains 12 hard centres and 8 soft centres. One chocolate is taken at random and eaten; then a second chocolate is taken. What is the probability the one is a hard centre and one a soft center?
A. 24/95 B. 48/95 C. 12/19 D. 4/5 E. 16/95
6) What is the area of the rectangle whose vertices are (a, 2b), (a, -b), (-3a, -b) and (-3a, 2b)?
A. ab B. 3ab C. 4ab D. 8ab E. 12ab
7)Refer to the following definition: For all positive integers x, X =√x . Which of the following equals 3?
A. 3 B. 6 C. 9 D. 27 E. 81
8) If the sum of interior angles of a polygon is five times the sum of its exterior angles, how many sides are there?
A. 9 B. 12 C. 15 D. 20 E. 24
9) Bag A contains 3 white and 2 red balls. Bag B contains 1 white and 3 red balls. A ball is taken at random from Bag A and placed in Bag B. A ball is then chosen from Bag B. What is the probability that the ball taken from Bag B is red?
A. 3/5 B. 9/25 C. 6/25 D. 1/5 E. 7/25
10) Each angle of a cyclic quadrilateral is either 110 0 or 70 0 . This quadrilateral must be a
A. Rhombus B. Trapezium C. Parallelogram D. Square E. None of the above
From Math puzzle 33 to Math Teasers
Home