Last Question:
Unscramble the letters
t-r-e-b-e
to describe a french hat
Answer:
b-e-r-e-t
This week’s Challenge:
This problem will take a few days to solve, so it is perfect for the holidays when you are looking for fun activities. I will post the answer on New Year’s day.
Consider the numbers 1 to 40, inclusive. Imagine trying to express each of those numbers as a combination of other numbers that are added or subtracted together – for example, 3 can be 1+2 or it can be 4-1.
Identify four numbers that, either singly or combination with some or all the other three numbers, can express every number from 1 to 40. In each combination however, any given number can appear only once – for example, 5 + 5 is not allowed. To check your answer fill in the table below with the various combinations.
1 =
2=
3=
4=
5=
6=
7=
8=
9=
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13=
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22=
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25=
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31=
32=
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38=
39=
40=