The Main Challenge
Using the numbers 3, 5 and 7 once each, with + – × ÷ available, list the FIVE even-numbered target numbers from 30-60 inclusive that are mathematically possible to make.
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 & 3rd rows contain the following fourteen numbers:
2 9 13 14 15 22 25 36 40 42 45 66 72 80
What is the sum of the multiples of 8?
The Factors Challenge
Which of the following numbers are factors of 307?
3 5 7 9 11 13 None of them
The Mathematically Possible Challenge
Using 3, 8 and 10 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?
30 31 32 33 34 35 36 37 38 39
#NumbersIn30s
The Target Challenge
Can you arrive at 307 by inserting 3, 5, 7, 9 and 11 into the gaps below?
- ◯×◯×◯+◯–◯ = 307
Answers can be found here.
Click Paul Godding for details of online maths tuition.
