Puzzler's Elusion by Shasha Dennis

Author:Shasha, Dennis [Shasha, Dennis]
Language: eng
Format: mobi
Publisher: Running Press
Published: 2010-10-20T22:00:00+00:00

Warm-up: How many possibilities are there for five rungs?

Solution to warm-up: For five rungs, there are two possible first steps: go to the first rung or to the second. If you go to the first rung, then there are four remaining rungs, giving rise to five possibilities. If you go to the second rung, then there are three remaining rungs. So there are three more possibilities. This gives a total of eight.

“This reasoning is a big hint.”

1. How many possibilities are there for an eight-rung ladder? An applicant will need to know this to apply.

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