DAY 317:

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:296   C:3515   D:14+10   A:5×5   H:72÷3   E:7×4   F:16+11

  • Section 2

H:15+12   B:348   F:9×3   E:48÷2   C:11×2   G:60÷3   A:17+12   D:4015

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 47 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.

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