Sum of all positive integers from 1 to 100 is
- The digits of a two-digit number add up to 9. If 27 is subtracted from the number, the digits switch places. What is the number?
In a class, 1/3 of the students are girls and rest are boys. If 3/5 of the girls and 1/5 of the boys are absent, what part of the total number of studen...

If a cube of a number is subtracted from (153)², the number so obtained is 1457, Find the number.
 Find the range of the given data:
18, 23, 36, 41, 55, 12, 62, 50, 48
- When 40% of a number is added to the number itself, the result is 21 more than the original number. What is the resulting number?
Find the number of zeroes in the end of 100!
There is a fraction whose denominator is 5 more than its numerator. If the numerator is increased by 10 and denominator is decreased by 4, the fraction ...