P, Q and R start at the same time in the same direction to run around a circular stadium. P completes a round in 252 seconds, Q in 308 seconds and R in 198 seconds, all starting at the same point. After what time will they again at the starting point?

Two men A and B undertake work for Rs. 1521 They can complete it in 18 days and 39 days respectively. They work along with a third man C and complete it in 9 days. Find the share of B.

Yogendra sold a computer for Rs. 17,940 with a discount of 8% and gained 19.6%. If no discount is allowed, then what will be his gain percent?

A cistern has three pipes A, B and C connected in the bottom. Pipes A and B can fill the cistern in 12 minutes and 18 minutes respectively while pipe C is an outlet pipe which empties the cistern. If the time taken by pipe A and B to fill the cistern when pipe C is also opened is 20 minutes then find the time taken by pipe C to empty the full cistern?

What approximate value should come in place of the question mark (?) in the following question (Note: You are not expected to calculate the exact value)?

7320 ÷ 348 × 12 + 33.0003% of 509.999 + (838 ÷ 14.95) × 17.95 = ?

What approximate value should come in place of the x in the following questions? (You are expected to do approximations)

x% of (6750 ÷ 15) – 12.12 × 16.16 = 116.99 – 23.99% of 649.891

What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value).

70.04 × 0.81 × 105.05 × 0.2 + 106.08 × 0.51 − 25 + 29.98 = ?

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

(Note: you are not expected to calculate the exact value)

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

49.75% of 749.69 + 45% of 420.02 – ? = 15²

What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

36.045² + 6.91² − 37.16² = ?