The Main Challenge
Read the following facts to work out my identity:
- I am a 2-digit number
- my two digits have a difference of four
- add 13 to me and I become a square number
Who am I?
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 2nd & 3rd rows contain the following fourteen numbers:
8 13 17 25 28 36 42 45 48 55 63 64 66 80
What is the difference between the highest and lowest multiples of 5?
The Factors Challenge
Which of the following numbers are factors of 291?
3 5 7 9 11 13 None of them
The Mathematically Possible Challenge
Using 8, 10 and 12 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?
7 14 21 28 35 42 49 56 63 70
#7TimesTable
The Target Challenge
Can you arrive at 291 by inserting 2, 3, 3, 5 and 6 into the gaps below?
- ◯×(◯²×(◯+◯)–◯) = 291
Answers can be found here.
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