The Main Challenge
This number puzzle is based on the concept of my FlagMath series of card games. Here is an example of a typical challenge in the Multiplication edition.
Each of the nine letters, A-I, in the two sections below contains a multiplication calculation. Which is the only letter to have the SAME answer in BOTH sections?
- Section 1
E:9×4 H:6×5 G:8×2 A:6×4 D:10×2 I:4×3 F:5×2 B:8×3 C:7×5
- Section 2
F:6×6 I:9×3 A:5×3 H:4×4 C:3×3 E:8×2 B:7×4 D:5×4 G:10×3
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 2nd & 3rd columns contain the following fourteen numbers:
2 4 10 12 15 16 17 33 35 45 48 70 80 81
Find the square root of each of the square numbers listed above. What is their sum?
The Factors Challenge
Which FIVE numbers below are factors of 348?
2 3 4 5 6 7 8 9 10 11 12
The Mathematically Possible Challenge
Using 1, 3 and 9 once each, with + – × ÷ available, which are the only TWO numbers 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 348 by inserting 2, 3, 4, 5 and 6 into the gaps on both lines below?
- (◯²+◯²)×(◯²÷◯+◯) = 348
- (◯×◯+◯)×◯×◯² = 348
Answers can be found here.
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