Quantitative Aptitude - Arithmetic Ability Questions

What is the value of a2 + b2a3 - b3, when a + b = 8 and a - b = 2?

If the 3rd and the 5th term of an arithmetic progression are 13 and 21, what is the 13th term?

Select the odd word/letters/number/number pair from the given alternatives.

Select the odd word/letters/number/number pair from the given alternatives.

ΔDEF is right angled at E. If m∠F = 30 deg, then find the value of (sinD - 1/3).

The sum of a non-zero number and twenty times its reciprocal is 9. What is the number?

n an alloy, lead and tin are in the ratio of 2 : 3. In the second alloy, the ratio of same elements is 3 : 4. If equal quantities of these two alloy are mixed to forma new alloy, then what will be the ratio of these two elements in the new alloy? 

If the amount received at 10% per annum Compound interest after 3 yrs is Rs 19965, then what will have been the principal (in Rs) amount?