The sum of the squares of 2 number is 146 and the square root of one of them is 5. The cube of the other number is 

The product of two whole numbers is 37. The square root of the difference of the numbers is

There are some boys and girls in a room. The square of the number of the girls is less than the square of the number of boys by 28. If there were two more girls, the number of boys would have been the same as that of the girls. The total number of the boys and girls in the room are

The smallest number which should be added to the number 8958 so that the result is a perfect square is 

The number of digits in the square root of 625686734489 is 

(53×87+159×21+106×25) is equal to 

How many positive integers less than 1000 are multiples of 11 whose square roots are whole numbers

The shadow of a tower, when the angle of elevation of the sun is 60° is found to be 15 m shorter than when it is 45°. Then height of the tower is