Today’s Challenge
Using the three digits 4, 6 and 9 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?
7 14 21 28 35 42 49 56 63 70
#7TimesTable
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 5th & 7th rows of the playing board contain the following fourteen numbers:
4 6 7 11 16 21 24 27 30 50 70 77 81 84
How many square numbers are listed?
Make 140 Challenge
Can you arrive at 140 by inserting 2, 6, 8 and 10 into the gaps on each line?
- ◯²+◯²+◯÷◯ = 140
- (◯+◯)²–(◯–◯)² = 140
- ◯³+◯²–◯×◯ = 140
Answers can be found here.
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