DAY 209:

Today’s Challenge

. . . is very famous in Japan, having recently been used as an integral part of a TV advert for Google’s Nexus 7 tablet.  Click this YouTube link for a browse.

Using the numbers 1, 1, 5 and 8 exactly once each, with + – × and ÷ available, can you beat this tricky Japanese challenge by arriving at the target answer of 10?

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 2nd & 5th rows of the playing board contain the following fourteen numbers:

6    7    8    16    17    21    28    48    50    55    63    64    81    84

How many more even numbers than odd numbers are listed above?

Make 209 Challenge

Can you arrive at 209 by inserting 2, 7, 9 and 12 into the gaps below?

(◯+◯)×(◯+◯) = 209

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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