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Puzzled Kangaroo: Are You Smarter Than Average?

Here’s a problem that will pick your brains! Figure out how many jumps it takes for a kangaroo to get up a hill.


A kangaroo is stuck at the bottom of a muddy hill that is 15 feet high


He can jump up to 4 feet


But he slides back two feet each time he takes a leap


How many jumps will get him to the top of the hill?

If you think the answer is 8 jumps…


You’re wrong!

By trying to take the shortcut, you forget that the kangaroo actually jumps further than 2 feet at first, but slips backwards. Think about the kangaroo after his sixth jump. He has reached 12 feet.

A 2 foot increase for the next jump puts him at 14 feet


But, he doesn’t only go 2 feet forwards, he goes 4 feet at first and then would slip back – straight from 12 feet to 16 feet.




By this time, on his seventh jump, the kangaroo has reached the top of the hill.

Find out more about how you can help develop your interest in problem solving HERE