Quantitative Aptitude - Arithmetic Ability Questions

What least number must be subtracted from 518, so that the sum is completely divisible by 13?

A man spends 15% of his income. If his expenditure is Rs. 75, his income (in rupees) is:

Total surface area of a cube is 486 sq cm, find sum of length of all its edges?

If the sum of squares of three consecutive natural number is 2702. Then, what will be the middle number?

The sum of the digits of a 2­digit number is 17. If we add 9 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.

Raghu's tanker can fill a cistern in 4 hours. After half the cistern is filled, three more similar tankers are opened. What is the total time taken to fillthe cistern completely?

A can paint a house in 42 days and B can do it in 21 days. Along with C, they can finish the job in 7 days only.C alone can do the painting job in how many days, ?

The arithmetic mean of the marks scored by students of a class is 58. 20% of them secured a mean score of 60. The mean score of another 30% of the students was 40. The mean score of the remaining students is