The Main Challenge
Here is a FlagMath-style puzzle derived from our series of card games.
Each of the eleven letters, A-K, in the two sections below contains a percentage calculation. Which is the only letter to have the SAME answer in BOTH sections?
- Section 1
F: 40% of 60 A: 25% of 20 G: 50% of 30 B: 60% of 35 D: 20% of 40 J: 30% of 5 K: 16% of 50 C: 70% of 30 H: 15% of 60 E: 10% of 100 I: 5% of 80
- Section 2
H: 1% of 500 D: 80% of 10 K: 2% of 200 G: 30% of 80 J: 20% of 50 F: 10% of 40 C: 25% of 60 I: 70% of 20 A: 15% of 200 E: 5% of 140 B: 8% of 300
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 2nd & 3rd rows contain the following fourteen numbers:
8 13 17 25 28 36 42 45 48 55 63 64 66 80
When finding the highest multiple of 7 on the list, what is double this number?
The Factors Challenge
Which of the following numbers are factors of 293?
3 5 7 9 11 13 None of them
The Mathematically Possible Challenge
Using 8, 10 and 12 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?
2 3 5 7 11 13 17 19 23 29
#PrimeNumbers
The Target Challenge
Can you arrive at 293 in two different ways when inserting 4, 9, 16, 25 and 36 into the gaps below?
- ◯²+◯+√◯+√(◯×◯) = 293
Answers can be found here.
Click Paul Godding for details of online maths tuition.
