Aptitude

If A:B = 2:3 and A+B = 45, find B.

Salaries of A and B are in ratio 3:5. Both get a raise of Rs 1000, and the ratio becomes 13:21. Find the original salaries.

The ratio of milk to water in a mixture is 5:2. Find the quantity of water in a 70-litre mixture.

If 2A = 3B = 4C, find A:B:C.

Two numbers are in ratio 5:7. If their LCM is 175, find the numbers.

Find the average of 10, 20, 30, 40, 50.

Find the average of the first 10 natural numbers.

Find the average of the first 10 even numbers.

Find the average of the first 10 odd numbers.

Average weight of 30 students is 40kg. Including a teacher weighing 70kg, find the new average.

The average of 5 numbers is 20. Excluding one number, the average becomes 18. Find the excluded number.

Average age of a class of 30 students is 12. Including the teacher's age, the average becomes 13. Find the teacher's age.

The average of 5 consecutive numbers is 25. Find the largest number.

The average of 3 numbers is 20; average of the first two is 18, and of the last two is 25. Find the middle number.

The average of 11 numbers is 10; average of the first 6 is 8 and last 6 is 13. Find the 6th number.

Runs scored by a batsman in 5 innings: 40, 50, 60, 70, 80. Find the average.

A cricketer's average for 10 innings is 40. Find the runs needed in the 11th innings to raise the average to 42.

The average of 4 consecutive even numbers is 27. Find the largest.

Average marks of 40 students is 60. If 5 students with average 40 leave, find the new average.

Average of 100 numbers is 40; average of the first 40 numbers is 35. Find the average of the remaining 60.

Find the average of the squares of the first 5 natural numbers.

The average of 9 numbers is 50. Removing one number (65), find the new average.

Average height of 25 boys is 160cm; average height of 15 girls is 150cm. Find the combined average.

Average of 5 consecutive odd numbers is 61. Find the smallest.

Average of two numbers is 35. If one number is 40, find the other.