Two times a number is a 100% increase in the number. If we take half the number what would be the decrease in percent?

A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new numbers becomes twice the other new number. What are the numbers?

Two numbers are in the ratio 5 : 3 . If they differ by 18, what are the numbers?

If 7 be added to the sum of the digits of a certain number consisting of two digits, the result will be three times the number in the ten's place. But if 18 be substracted from the number, the digits wil be interchanged. Find the numbers.

A number is three times of another number. If 7 is substracted from the greater, the smaller increases by 3. Find the numbers.

If 2 be added to the sum of the digits of a certain number consisting of two digits, the result will be two times the number in ten's place. But if 18 be subtracted from the number, the digits will be interchanged. Find the number.

Sum of two numbers is 95. If one exceeds the other by 15, find the numbers.

The denominator of a rational number is greater than its numerator by 8. If the numberator is increased by 17 and the denominator is decreased by 1, the number obtained is frac(3)(2) . Find the rational number.

If 4 be added with four times of the digit of the unit place of a certain number consisting of two digits, the result will be two times of the sum of the digits. But if 18 be subtracted from the number, the digit will be interchanged. Find the number.

What will be the number of zeroes in the square of the following numbers? 60