Which of the following is considered an "existing Unit"

Find the Sum of all the even Factors of ‘240’

Find the number of Digits required to write down the number of Pages in a 500 page book?

Let x = (726)²⁴⁵ – (437)⁴⁵⁸ + (333)³³⁵. What is the unit digit of x?

What is the ratio of the sum of the squares of the first 8 natural numbers to the sum of the first 12 odd natural numbers?

Out of a certain number of books, 2/5 are novels and the rest are textbooks. If the number of textbooks is 36, find the total number of books.

What is the smallest number that must be added to 750, so that it becomes completely divisible by 42?

Find the value of 6 + 66 + 666 + 6666 +hellip;hellip;hellip;hellip;.. + n terms.

1. `(2)/(3) ((10 xx (10^(n)- 1))/9 - n)`

2.

Find the largest three-digit number that leaves '3', '4' and '5' as remainder when it is divided by '7', '8' and '9', respectively.