Today’s Challenge
You have the same starting number and final answer, both 22. There are 10 arithmetical steps altogether but the 10th, and final, step is missing. If this final step involves a whole number, what should it be to arrive at 22?
Start with the number 22, then:
+2 ÷6 ×4 –3 ×2 +4 ÷5 +6 ×2 ? = 22
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from 2 up to 84.
The 3rd & 5th rows contain the following fourteen numbers:
6 7 13 16 21 25 36 42 45 50 66 80 81 84
List three different numbers that have a sum of 100.
Make 171 Challenge
Can you arrive at 171 by inserting 3, 6, 9 and 9 into the gaps below?
◯×◯×◯+◯ = 171
Answers can be found here.
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