DAY 188:

Today’s Challenge

Try the following number challenge similar to the ones found in my MATHELONA pocket book of challenges. Click the link for details.

Your task is to make all four lines below work arithmetically by replacing the 16 ◯’s with the following list of 16 digits. It’s tricky – can you do it?

0    0    1    1    2    2    4    4    5    5    6    6    7    7    8    9

◯  +  ◯   =    15    =   ◯  +  ◯
◯  +  ◯   =     2     =   ◯  –  ◯
◯  +  ◯   =     8     =   ◯  ×  ◯
◯  +  ◯   =     1     =   ◯  ÷  ◯

Leave a comment below if you get an answer!

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 2nd & 3rd rows contain the following fourteen numbers:

8    13    17    25    28    36    42    45    48    55    63    64    66    80

How many multiples of 16 are on the list?

Make 188 Challenge

Can you arrive at 188 by inserting 2, 9, 10 and 11 into the gaps below?

(◯×◯×◯)–◯ = 188

Answers can be found here.

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

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