Aptitude

A sugar solution has 40% sugar. How much water must be added to 10L to bring it to 25% sugar?

A mixture has alcohol and water in ratio 4:3. Adding 7L water changes the ratio to 4:5. Find the quantity of alcohol.

In what ratio should sugar costing Rs 45/kg and Rs 30/kg be mixed to get a mixture worth Rs 36/kg?

A 7L mixture has milk:water = 5:2. Half is removed and replaced with water. Find the new ratio.

Find the ratio in which sugar at Rs 15/kg should be mixed with sugar at Rs 20/kg to get a mixture worth Rs 16.50/kg.

Present ages of A and B are 30 and 20. Find the ratio of their ages after 10 years.

Sum of present ages of A and B is 40. Five years ago, A was twice as old as B. Find the present ages.

A is 4 times as old as his son. After 20 years, A will be twice as old as his son. Find the present ages.

Ratio of father's and son's ages is 5:2. After 10 years the ratio becomes 2:1. Find the present ages.

A father's age is 3 times his son's; 12 years ago it was 5 times. Find their present ages.

Ratio of P and Q's ages is 3:5. Ten years hence the ratio will be 5:7. Find their present ages.

Sum of a father's and son's ages is 50. Five years ago, the father was 4 times as old as the son. Find their present ages.

A man's age is 125% of what it was 10 years ago. Find his present age.

Ratio of ages of two brothers is 1:2; five years back it was 1:3. Find their present ages.

A is 3 years older than B, who is twice as old as C; the sum of ages is 33. Find C's age.

Average age of a 5-member family is 20; the youngest is 10. Find the average age of the other members at the time the youngest was born (10 years back).

Sum of ages of 5 children born at 3-year intervals is 50 years. Find the youngest child's age.

A person's age after 15 years will be 5 times his age 5 years ago. Find his present age.

Ratio of A and B's ages 4 years ago was 1:2; four years hence it will be 3:5. Find their present ages.

Present ages of A and B are in ratio 6:5. Four years hence the ratio becomes 7:6. Find their present ages.

A and B invest Rs 3000 and Rs 5000. Find the ratio of their profits.

A invests Rs 4000 for 6 months; B invests Rs 6000 for 4 months. Find the profit ratio.

A, B, C invest in ratio 2:3:5. Total profit is Rs 5000. Find C's share.

A starts a business with Rs 5000. After 4 months, B joins with Rs 10,000. Find the profit ratio at year-end.

Three partners share profit in ratio 4:5:6. If total profit is Rs 3000, find the largest share.