Grade 5 - Mathematics - Average

The average of 3 numbers is 17. Two of the numbers are 13 and 18. What is the third number?

Joe had $12. Karim had $4 less than Joe. Raj had $5 more than Karim. What was the average amount of money they had?

Jalil caught 4 fish with a total mass 3.5 kg. The average mass of 3 of them is 0.92 kg. What was the mass of the fourth fish?

Lina reads an average of 16 pages of a book every day. How many pages will she read in 2 weeks?

The average of 2 numbers is 15 670. If the difference between them is 11 212, what is the smaller number?

The average height of 15 boys is 1.52 m. If one boy is 1 m 66 cm tall, what is the average height of the other 14 boys?

The sum of 14 numbers is 104. If the sum of 2 of the number is 23, find the average of the remaining numbers.

Mathematical Equivalence

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At an archery competition, 6 men scored an average of 54 points. The winner's score was 4 points more than that of the runner up. The average score of the rest was 47 points. How many points did the winner score?

The average mass of 2 ducks and 3 duckling is 1.92 kg. The average mass of 3 ducks and 5 duckling is 1.85 kg. All ducks have the same mass, and all ducklings have the same mass. What is the total mass of 2 ducks and 1 duckling?