What would be the compound interest (in Rs.) accrued on an amount of Rs.9000 at the rate of 11 pcpa in two years?

What should come in place of question mark (?) in the following number series?
9    10    24    81    340 ?

On a particular day, sweets were to be equally distributed among 960 students of a school. However, on that particular day, 360 students remained absent. Hence each student present on that day got three sweets extra. Had all 960 students remained present that day, how many sweets would each student have got?

3451 ÷ 9.895 × 3.0126 = ?

√230 ÷ 2.017 ÷ 58.794 = ?

(3.805)^{2 ×} 14.018 − 5991 = ?