Can You Solve The Number Of Kids Logic Puzzle?

This logic puzzle by Presh Talwalkar of the MindYourDecisions YouTube channel requires some algebra. Scroll down to read the puzzle, and keep scrolling for the answer (and for even more logic puzzles).

Here's The Puzzle

The average age of a family—made up of two parents with kids—is 20. If you exclude one parent, who is 40, the average age drops to 15. How many kids are in the family? Scroll down to read the answer, and watch the video below to see how it's worked out.

Related: Can You Solve The Four-In-A-Row Logic Puzzle?

Can You Solve The Number Of Children Riddle?

Here's The Solution

There are two parents and three kids in this family. Did you solve the puzzle? Watch the video above to see how algebra was used to get to the answer. Keep the logic puzzles going by scrolling down.

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Written by Curiosity Staff May 11, 2017