The Main Challenge
Here is a number puzzle similar in concept to my FlagMath card game. Many schools are now playing the various editions, so here’s a taster:
Each of the eight letters, A-H, in the two sections contain a calculation with an answer in the 20’s:
- Section 1
B:84÷4 G:29–6 C:35–15 D:14+10 A:5×5 H:72÷3 E:7×4 F:16+11
- Section 2
H:15+12 B:34–8 F:9×3 E:48÷2 C:11×2 G:60÷3 A:17+12 D:40–15
Which is the only letter that has the SAME answer in BOTH sections?
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 & 2nd columns contain the following fourteen numbers:
2 10 13 16 21 22 27 33 45 48 55 56 60 70
How many of the above become prime numbers when 10 is added to them?
The Factors Challenge
Which of the following numbers are factors of 317?
3 5 7 9 11 13 15 17 None of them
The Mathematically Possible Challenge
Using 4, 7 and 11 once each, with + – × ÷ available, which are the THREE 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 317 by inserting 7, 8, 9, 10 and 11 into the gaps below?
- ◯×◯×√◯+◯×◯ = 317
Answers can be found here.
Click Paul Godding for details of online maths tuition.
