# Ratio, Proportion and Percentages Puzzle -Critical Thinking 9

Math puzzles are a great way to engage students in developing critical thinking skills. This math puzzle is an educational activity for practicing children's math skills.

## Challenge:

The average of five numbers is 11 and the average of eight numbers is 7.75. What is the average of these 13 numbers?

$11.99 Satisfied 123 Students The correct answer is 9. The average of five numbers is 11. Therefore, their sum is: 5 × 11 = 55 The average of eight numbers is 7.75. Therefore, their sum is: 8 × 7.75 = 62 The sum of all 13 numbers is 55 + 62 = 117 Therefore, the average of these 13 numbers is: 117 ÷ 13 = 9 ## Related to This Article ### More math articles ### What people say about "Ratio, Proportion and Percentages Puzzle -Critical Thinking 9"? No one replied yet. X 30% OFF Limited time only! Save Over 30% SAVE$5

It was $16.99 now it is$11.99