A whole number is added to 50 and the same number is subtracted from 50. The sum of the resulting numbers is 

The sum of two numbers is 29, the difference between the squares of those numbers is 145. There will be a difference of those numbers.

B walks at a speed of 9 km/h and after 9 hours of its start, C follows him on his cycle at a speed of 18 km/h. At what distance from the starting point will C catch B?

A sum of money becomes Rs 16000 in 6 years at the rate of 25% per annum simple interest. What is the total interest for 6 years?

3240, 540, 108, 27, ? , 4.5

A can do a work in 12 days while B can do the same in 20 days. If A work for ‘x’ days while B work for ‘x+4’ days then one-third of the work is complete. Find the value of x.

In what time will the annual simple interest rate at $$ {6{1\over4}{\%}}$$ , 72 rupees becomes 81 rupees?

If the sum of first three natural numbers from a group of six consecutive natural numbers is 36, then the sum of last three natural numbers will be?