How can we get answer as 100 by using four 9s by any mathematical operations

Multiply the length by the depth to get 100 meters squared.

Divide 45000 by 220000 then multiply by 100 to get about 20.5%.

This is the classic "Four Fours" problem. Combine the four fours as
4 / 4 + 4 * 4 with the operations taking place from left to right. The first 4 divided by the second produces 1. Add the third 4 to produce 5. Multiply by the fourth 4 results in 20.

To add or subtract fractions, the denominators must be the same. The lowest common denominator in the question is 100, so 3/4 becomes 75/100:

15 17/100 14 117/100
-2 75/100 is the same as -2 75/100
12 42/100 = 12 21/50

1 kilo is non-water

at 99% Water weight, 1 kilo is 1 % Thus 100 kilos total

at 98% Water Weight 1 kilo is 2% thus 50 kilos total.

Answer: 50 Kilos

use simultaneous equations, with x = # of men and y = # of women:
x + y = 5000 --> convert to x = 5000 - y 1.1x + 1.15y = 5600
1.1 (5000 - y) + 1.15y = 5600 5500 - 1.1y + 1.15y = 5600 .05y = 100 y = 2000 plug y = 2000 into x + y = 5000
therefore x = 3000

Zero! And....Zero!

Have a good day.

Thanks for using Fixya.