Today’s Challenge
A palindromic number is a number that can be read the same forwards and backwards (e.g. 333 and 797). How many palindromic numbers are there between 100 and 1,000?
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 1st & 7th rows of the playing board contain the following fourteen numbers:
2 4 9 11 14 15 22 24 27 30 40 70 72 77
What is the sum of the multiples of 9?
Make 124 Challenge
Can you arrive at 124 by inserting 5, 8, 10 and 16 into the gaps on each line?
- (◯+◯)×◯+√◯ = 124
- ◯×◯–(◯÷◯)² = 124
- (◯–◯÷◯)×◯ = 124
Answers can be found here.
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