# DAY 231:

Today’s Challenge

Try the following MATHELONA-style challenge, similar to those found in our pocket book, details of which can be found by clicking MATHELONA.

Your task is to make all four lines work out arithmetically by replacing the 16 ◯’s below with the following 16 digits.  Can you complete it?

0    0    1    2    2    2    2    4    4    5    5    6    6    7    7    8

◯  +  ◯   =     6     =   ◯  +  ◯
◯  +  ◯   =     5     =   ◯  –  ◯
◯  +  ◯   =    12    =   ◯  ×  ◯
◯  +  ◯   =     7     =   ◯  ÷  ◯

The 7puzzle Challenge

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

The 2nd & 4th rows of the playing board contain the following fourteen numbers:

3    8    10    17    28    32    35    44    48    54    55    60    63    64

From the list, find two pairs of numbers that each have a difference of 29.

Make 231 Challenge

Can you arrive at 231 by inserting 5, 10, 15, 20 and 25 into the gaps below?

(◯×◯)–◯–(◯÷◯) = 231

Click Paul Godding for details of online math tuition. Wherever you are in the world, please get in touch.

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