DAY 321:

The Main Challenge

This unique Mathematically Possible question asks you to consider three different combinations of numbers by using each number just once and + – × ÷ available.

  •   2   6   10
  •   3   7   10
  •   4   8   10

What is the ONLY target answer from 10-30 that can be made by ALL three combinations?

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 5th & 6th columns contain the following fourteen numbers:

7   8   11   14   18   25   30   36   40   44   49   54   64   84

How many more square numbers are listed than cube numbers?

The Factors Challenge

Which of the numbers below are factors of 321?

3    5    7    9    11    13    None of them

The Mathematically Possible Challenge

Using 56 and 12 once each, with + – × ÷ available, which FOUR numbers is it possible to make from the list below?

3    6    9    12    15    18    21    24    27    30

#3TimesTable

The Target Challenge

Can you arrive at 321 by inserting 13, 4, 7 and 8 into the gaps below?

  •  (◯+◯)××◯+◯ = 321

Answers can be found here.

Click Paul Godding for details of online maths tuition.

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