T he Main Challenge
Start at 7 and subtract 0.1, followed by 0.2, then 0.3 . . . and so on.
What is the first answer less than 1 you will arrive at . . . and the first negative number following that?
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 3rd & 7th rows of the playing board contain the following fourteen numbers:
4 11 13 24 25 27 30 36 42 45 66 70 77 80
How many multiples of 3 are listed?
The Factors Challenge
Which of the following numbers are factors of 256?
2 4 6 8 10 12 14 16
[ Today’s Hint: A number is a multiple of 8 if you halve it, halve it again . . . and it’s still even! ]
The Mathematically Possible Challenge
Using 5, 8 and 11 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 256 by inserting 2, 3, 4, 5 and 6 into the gaps below?
- ◯³×◯²×√(◯+◯–◯) = 256
Answers can be found here.
Click Paul Godding for details of online maths tuition.
