Mathematics - Important Questions and Answers

1. The number just preceding 9909 which is a perfect square is:
a. 9908
b. 9900
c. 9899
d. 9801
Answer: D

2. What is the least number to be added to 631 to make it a perfect square?
a. 45
b. 46
c. 35
d. None of the above
Answer: A

3. Three-fifth of the square of a number is 126.15. What is the number?
a. 15.1
b. 14.5
c. 14.3
d. 87.9
Answer: B

5. What is smallest positive integer which when multiplied by 392,  gives a perfect square?. 
a. 5
b. 4
c. 3
d. 2
Answer: D