Quantitative Aptitude - Arithmetic Ability Questions

What is the mean of the first five Triangular Numbers?

A sum of money (P) doubles in 10 years. How much would it be in 20 years at the same rate of simple interest?

The sum of the digits of a 2-digit number is 8. If we add 36 to the number, the new number obtained is a number formed by interchange of the digits. What is the number?

A sum of Rs 4000 becomes Rs 5800 in 3 years, when invested in a scheme of simple interest. If the same sum is invested in a scheme of compound interest with same yearly interest rate (compounding of interest is done yearly), then what will be the amount (in Rs) after 2 years?

Simplify 576b3x2a4z3/36a3b2z

Find out the odd word/letters/number/number pair from the given alternatives.

Select the odd letters from the given alternatives.

If the shopkeeper sells an item at Rs 1000 which is marked as Rs 1250, then what is the discount he is offering?