P and Q complete a work in 90 days. Q and R can do it in 120 days. P and R can do it in 72 days. In how many days will P, Q, R together complete the work?

Choose the incorrect number in the given series:

64, 729, 4096, 16625, 46656

Find the number which would replace the question mark in the series given below.

13, 17, 25, 32, 37, ?

The area of triangle decreases by 8 sqm if its base increases by 1m and height decreases by 2m. The area stays the same if the height increases by 2m and base decreases by 2m. The height of the triangle is

Observe the given triangle and calculate the value of cos2x?

If I sell an article for Rs 944, I gain 18%. Find the CP of an article.

A bank offers a simple interest of 8 % per annum on fixed deposits. Mohit deposits a certain sum in the bank. At the end of 5 years, he withdraws the entire amount from the bank and deposits 50 % of this amount in another bank which offers a simple interest of 10 % per annum. After another 2 years, Mohit gets 16800 rupees from the second bank. What is the amount that he invested in the first bank?

Ram bought an article and marked its price 60% above of its value and earned a profit of 20%, What is the percentage discount Ram offered to his customers?

The cost price of 10 items is equal to the selling price of 8 items. What is the profit percentage?

Find the compound interest on 25000/- for 3 years at 15% per annum ?