Square of any number between 100 to 120 in 5 seconds without calculator

Number of natural numbers between 100 & 1000 such that at least one of their digits is 6, is

Write all prime numbers between 50 and 100.

Write any 3 rational numbers between and 0.

Find the sum of all natural numbers between 100 and 1000 which are multiples of 5.

Find the sum of all natural numbers between 100 and 1000 which are multiple of 5.

Find the number of digits in the square root of each of the following numbers (without any calculation). (i) 64 (ii) 144 (iii) 4489 (iv) 27225 (v) 390625

Find the sum of all natural numbers lying between 100 and 1000, which are multiples of 5.

How many numbers between 10 and 10,000 can be formed by using the digits 1, 2, 3, 4, 5 if No digit is repeated in any number

{:("Column A"," ", "Column B"),("The count of the numbers between 100 and 300 that are divisible by both 5 and 6",,"The count of the numbers between 100 and 300 that are divisible by either 5 or 6"):}

The angular velocity of flywheel changes from 240 rpm to 120 rpm in 6 seconds. Calculate the no of revolutions it will make before coming to rest.