BrainTwister #15: Domino strips

Can you solve this week’s logic puzzle? Plus our quick quiz and the answer to last week’s problem

10 April 2024

#15 Domino strips

Set by Peter Rowlett

There are three ways to cover a 3 × 2 grid with dominoes.

How many ways are there to cover a 4 × 2 grid? What about a 6 × 2 grid?

Can you find a pattern that would help you work out the number of different ways dominoes can be used to cover any n × 2 rectangle?

Solution next week

Solution

Here’s a factor graph of 1-10:

You can connect every number up to 14, but adding 15 requires drawing lines to 3 and 5, which leads to crossing. If we exclude…

We have corrected the diagram for the solution to BrainTwister #14

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