# day/dydd 282 at 7puzzleblog.com The Main Challenge

Here’s another Mathelona challenge based on my popular number puzzles.

Can you make all four lines work out arithmetically by filling the 16 gaps with digits from 0 to 9?  Remember, each digit can only be inserted a maximum of TWICE:

◯  +  ◯   =    7    =   ◯  +  ◯
◯  +  ◯   =    4    =   ◯  –  ◯
◯  +  ◯   =    6    =   ◯  ×  ◯
◯  +  ◯   =    3    =   ◯  ÷  ◯

Full details of our pocket book of challenges can be found by clicking Mathelona. The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from up to 84.

The 1st & 6th rows contain the following fourteen numbers:

2   5   9   12   14   15   18   20   22   33   40   49   56   72

What is the sum of the multiples of 11? The Factors Challenge

Which is the ONLY one of the following numbers that is a factor of 282?

4     6     8     10     12     14     16     18 The Mathematically Possible Challenge

Using 27 and 10 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

10    20    30    40    50    60    70    80    90    100

#10TimesTable The Target Challenge

Can you arrive at 282 by inserting 1, 2, 3, 4 and 5 into the gaps below?

•  (²×(+)–◯)×◯ = 282   