Today’s Challenge
This describes a particular number less than 100:
- its digits add up to 12,
- if the unit digit is subtracted from the tens digit and doubled, the answer is also 12.
What is the number?
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 3rd & 4th rows of the playing board contain the following fourteen numbers:
3 10 13 25 32 35 36 42 44 45 54 60 66 80
List THREE different numbers that have a sum of 77.
Make 111 Challenge
Can you arrive at 111 by inserting 2, 3, 5 and 7 into the gaps on both lines?
- (◯×◯+◯)×◯ = 111
- (◯+◯)²+double(◯×◯) = 111
Answers can be found here.
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