The Main Challenge
One of our popular Mathelona challenges awaits you; can you complete this by making all four lines work out arithmetically? Fill the 16 gaps with digits 0 to 9, but each digit can only be inserted a maximum of twice.
◯ + ◯ = 8 = ◯ + ◯
◯ + ◯ = 8 = ◯ – ◯
◯ + ◯ = 8 = ◯ × ◯
◯ + ◯ = 7 = ◯ ÷ ◯
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from 2 up to 84.
The 1st & 5th rows contain the following fourteen numbers:
2 6 7 9 14 15 16 21 22 40 50 72 81 84
Which three different numbers listed have a sum of 100?
The Factors Challenge
Which of the following numbers are factors of 263?
3 5 7 9 11 13 None of them
The Mathematically Possible Challenge
Using 3, 7 and 9 once each, with + – × ÷ available, which are the FOUR numbers it is possible to make from the list below?
4 8 12 16 20 24 28 32 36 40
#4TimesTable
The Target Challenge
Can you arrive at 263 by inserting 4, 5, 6, 7 and 8 into the gaps below?
- (◯×◯×◯)+◯²+◯ = 263
Answers can be found here.
Click Paul Godding for details of online maths tuition.
