Today’s Challenge
Follow the rules below and eliminate every number from a given list, except one. Which number will be the last one to remain?
List the multiples of 10 from 10 to 100 inclusive, then eliminate:
- multiples of 4
- factors of 100
- multiples of 3
Which is the only number that remains?
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 columns of the playing board contain the following fourteen numbers:
5 7 9 24 28 30 32 36 40 49 50 54 64 66
How many multiples of 4 are listed?
Make 352 Challenge
Can you arrive at 352 by inserting 2, 4, 8, 11 and 16 into the gaps on each line?
- (◯+◯)×(◯+◯)–◯³ = 352
- ◯²×◯×◯×◯÷◯ = 352
Answers can be found here.
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