If N:38∷ 3:57, Find N.

The sum of four consecutive even number is 748.The smallest among them is-

What is the greatest number which will divide 110 and 128 leaving a remainder 2 in each case?

Six years ago, the ratio of the ages of the two persons P and Q was 3:2. Four years hence the ratio of their ages will be 8:7. What is P’s age?

The average weight of 5 persons sitting in a boat is 38 kg. The average weight of the boat and the persons sitting in the boat is 52 kg. What is the weight of the boat?

A ladder 20 m long is leaning against a vertical wall. It makes an angle of 30° with the ground. How high on the wall does the ladder reach?

What is the compound interest on Rs. 48,000 for 2 years at 20% p.a., if interest is compounded annually?

If three numbers are in the ratio 2:3:5 and the twice their sum is 100. Find the square of the largest of the three numbers.