Which smallest number should be subtracted from 1000 so that results will be a perfect square? 

A man has eaten 100 grapes in 5 days. He eats 6 more grapes every day in comparison to the previous day. How many grapes did he eat on the first day?

A student multiplies a number with 7.2 instead of 0.72. If due to this answer is 2592 more than the right answer, then what was the original number? 

There are four numbers in a set. The mean of the three smallest numbers is 9, whereas the mean of the three largest ones is 11. What is the range of the data set? 

The digit in the unit's place of the number represented by (7⁹⁵ - 3⁵⁸) is: 

The sum of three numbers is 252. If the first number is thrice the second and third number is two-third of the first, then the second number is

On dividing a certain number by 342 we get 47 as remainder. If the same number is divided by 18, what will be the remainder?

The sum of 10 terms of the arithmetic series is 390. If the third term of the series is 19. Find the first term