The Main Challenge
… is from the excellent card game, 24game. Using the numbers 2, 4, 6 and 8 once each, and with all four operations + – × ÷ available, show how you can reach the target number of 24.
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 contain the following fourteen numbers:
3 10 13 25 32 35 36 42 44 45 54 60 66 80
From the list, find the THREE pairs of numbers that have a sum of 57.
The Roll3Dice Challenge
From six of the seven groups of numbers below, it is possible to make today’s target number of 9 when each number in the group is used once and + – × ÷ is available:
- 1 2 3
- 1 3 4
- 2 2 5
- 3 3 4
- 3 5 6
- 4 5 5
- 4 6 6
Which is the only group that CANNOT make 9?
The Mathematically Possible Challenge
Using 4, 5 and 10 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?
11 22 33 44 55 66 77 88 99 110
#11TimesTable
The Target Challenge
Can you arrive at 9 by inserting 3, 4, 5 and 6 into the gaps on each line?
- ◯×◯–(◯+◯) = 9
- ◯+◯×(◯–◯) = 9
- ◯²–◯×(◯÷◯)² = 9
- ◯+(◯+◯)÷◯ = 9
Answers can be found here.
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