The Main Challenge
Each of the ten letters, A-J, in the two sections below contains a subtraction calculation:
- Section 1
E:7–4 J:2–1 G:7–5 A:8–6 C:4–2 I:8–5 F:6–5 B:9–8 H:9–5 D:5–4
- Section 2
I:4–3 A:6–3 H:3–1 B:7–6 F:5–2 J:9–6 E:9–7 G:7–3 D:6–4 C:8–7
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 of 49 different numbers, ranging from 2 up to 84.
The 3rd & 5th rows contain the following fourteen numbers:
6 7 13 16 21 25 36 42 45 50 66 80 81 84
What is the product of the two multiples of 10?
The Factors Challenge
Which of the following numbers are factors of 277?
3 5 7 9 11 13 15 17 19 None of them
The Mathematically Possible Challenge
Using 2, 7 and 10 once each, with + – × ÷ available, which FOUR numbers is it possible to make from the list below?
5 10 15 20 25 30 35 40 45 50
#5TimesTable
The Target Challenge
Can you arrive at 277 by inserting 1, 2, 3, 4 and 5 into the gaps below?
- (◯+◯)³+(◯–◯)³–◯ = 277
Answers can be found here.
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