# DAY/DYDD/GIORNO/NAP 336:

The Main Challenge

Try the following Mathelona challenge by placing the digits 0 1 1 2 3 3 4 4 5 6 7 and 7 into the 12 gaps below and making all three lines work out arithmetically.

◯  +  ◯   =     4     =   ◯  –  ◯
◯  +  ◯   =    12    =   ◯  ×  ◯
◯  +  ◯   =     1     =   ◯  ÷  ◯

Further details of our popular pocket book can be found by clicking Mathelona.

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 & 5th columns contain the following fourteen numbers:

8   11   13   14   18   21   22   25   27   44   55   56   60   84

How many pairs of numbers have a difference of 33?

The Factors Challenge

Which is the ONLY number below that is not a factor of 336?

2    3    4    6    7    8    9    12    14    16    21    24

The Mathematically Possible Challenge

Using 29 and 12 once each, with + – × ÷ available, which is the ONLY number 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 336 by inserting 3, 4, 6, 7 and 8 into the gaps below?

•  ◯×◯×◯×(◯–◯) = 336