Follow the rules to eliminate every number from 1-50, except one. Which one will be the last one standing after eliminating the following?
- multiples of 3
- square numbers
- prime numbers
- even numbers
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.
The 6th & 7th rows of the playing board contain the following fourteen numbers:
4 5 11 12 18 20 24 27 30 33 49 56 70 77
Which two numbers, when each is multiplied by 6, are represented on the above list?
Make 199 Challenge
Can you arrive at 199 by inserting 11, 12, 14 and 20 into the gaps below?
◯×◯+◯+◯ = 199
Answers can be found here.
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