DAY 348:

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 13 and 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
  •  (×◯+◯)×ײ = 348

Answers can be found here.

Click Paul Godding for details of online maths tuition.

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