A cloth merchant sold half of his cloth at 20 % profit, half of the remaining cloth at 20 % loss and the rest was sold at its cost price. In the total transaction, his gain or loss will be 

If 0.13 x p² = 13, then p is equal to

The sum of two numbers is 84 and their HCF is 12. Total number of such pairs of number is 

If pq+qr+rp=0 then find the value of $$ {p^{2}\over {p^{2}-qr}}+{q^{2}\over {q^{2}-rp}}+{r^{2}\over {r^{2}-pq}}$$

What approximate value will come in place of the question mark (?) in the following questions?

324.995 x 15.98 ÷ 4.002 + 36.88 =? 

Directions : What will come in the place of the question mark (?) in the following number series?

16, ?, 8, 12, 24, 60

The No. of mangoes on three baskets are in the ratio of 3 : 5 : 7. In which ratio the no. of mangoes in first two baskets must be increase so that the new ratio becomes 5 : 6 : 8.

How much interest will be received in 2.5 years at the rate of 4 percent simple interest of Rs. 3,680?