A man’s pension on retirement from service is equal to half the average salary during last 3 years of his service. His salary from 1-1-1983 is ₹380 per month with increment of ₹40 due on 1-10-83, 1-10-84 and 1-10-85, If he retires on 1-1-86, what pension does he draw per month?

The average age of 3 friends is 23 years. Even if the age of 4th friend is added, the average age remains the same. Then the age of the fourth friend is :

Numbers of boys and girls are ‘x’ and ‘y’ respectively. Ages of a girl and a boy are ‘a’ years and ‘b’ years respectively. The average age (in years) of all boys and girls is

Three years ago, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today. The present age of the baby is:

A, B and C enter into a partnership. A invests $ 2400 for 4 years, B $ 2800 for 8 years and C $ 2000 for 10 years. They earn $ 1170. Find the share of each.

A, B and C invest $ 1000, $ 4000 and $ 5000 respectively in a business. At the end of the year the balance sheet shows a loss of 20% of the total initial investment. Find the share of loss of B.

$ 52000 is to be divided among the partners A, B and C. The ratio of their investments is (1 / 12) : (1 / 18) : (1 / 24). Find the share of A.

A, B and C invest $ 15000, $ 20000 and $ 25000 respectively in a business. The profit earned is $ 1200. Find the share of A in the profit.

What percent above cost price should goods be marked for sale so that after allowing (25 / 2) % trade discount and 5% cash discount, a net gain of 33% may be earned?

A man purchases some mangoes at the rate of 3 for $ 4 and the same quantity at 5 for $ 6. If he sells all the mangoes at the rate of 3 for $ 5, find his approximate gain or loss per cent