P purchase an item for Rs 1200 and sold it on a profit of 10%. If he sells it at Rs 1380 then calculate his increase in profit percentage. 

Priya purchased two mixers for Rs.1500 and made a profit of 9% on one and loss of 6% on the other. But overall there is no profit or loss, then cost price of mixture are in the ratio?

If the difference between the roots of the equation Ax²+BX+C = 0 is 4, then which of the following is TRUE?

The annual payment of Rs.1000 in  5 years at 4% per annum simple interest will discharge a debt of

If the ratio of selling price and cost price is 4:5 respectively, then what is the loss percentage?

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 will come in place of question mark(?) in the following number series?
10, 14, 25, 55, 140 (?)