# Math Puzzle 24

This math puzzle 24 is on logical reasoning,percent,average speed etc.

1) The operations % and & are defined as x% y & z =xy/z. Then what is the value of (3%10&5) + (x%x2&x)?
A. 150+x3     B. 35+x3     C. 150+x2     D. 5+x2     E. 6+x2

2) (x-3) (x+3)2<0 if and only if
A. x < 3     B. x > - 3    C. x > 3     D. x > 0
E. x < 3 and x ≠ 3

3) Set A = {3,5,9,22,23,40,42} and set B = {1,2,3,5,9,23,42,51}. Which is the element that is not in the intersection of A and B?
A. 3     B. 6     C. 9     D. 23     E. 42

4)What is |-3| + |+3|?
A. 0     B. 6     C. -6     D. 9     E. None of these

5) If 3x2+ 9 = 2; what is -9 + 3x2?
A. √(2/3)+9     B. √(2/3)-9     C. 2     D. 16     E. - 16

6) If x = |+3| + |-3| and y = |+3| - |-3|, what is x-y?
A. -3     B. 0     C. 3     D. -6     E. 6

7) Which of the following lines is parallel to the line y=3x - 2?
I y = x - 2
II y = x + 2
III y = 3x + 9
IV y=0.3x-2
A. I     B. I and II     C. IV     D. I and III     E. III

8) A train travels at a speed of 60miles/hour for 2 hours, travels at a speed of 3 miles/minute for the next 1 hour. What is the average speed of the train in miles/hour for the entire journey?
A. 21     B. 31.5     C. 63     D. 100     E. 300

9) In 4 years from now, John will be 40 and Steve will be twice John's age. What is the age difference between Steve and John now?
A. 20     B. 36     C. 40     D. 76     E. 80

10) Sum of a number and half of the number is 10.5. What is 4 times the number?
A. 3.5     B. 7     C. 14     D. 28     E. 42

Math puzzle 24

From Math puzzle 24 to Math Teasers

Home