DAY 329:

Today’s Challenge

. . . is a MATHELONA number puzzle where you must solve all four lines arithmetically by replacing the 16 ◯’s below with digits 0-9.

Each digit 0-9 can only be inserted a maximum of TWICE in the whole puzzle:

◯  +  ◯   =     5     =   ◯  +  ◯
◯  +  ◯   =     3     =   ◯  –  ◯
◯  +  ◯   =    10    =   ◯  ×  ◯
◯  +  ◯   =     1     =   ◯  ÷  ◯

If you enjoyed this, click MATHELONA for details of my number puzzle pocket book.

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 5th & 7th columns of the playing board contain the following fourteen numbers:

5    8    9    11    14    18    24    25    28    32    44    50    66    84

Which three numbers become multiples of 7 when 11 is subtracted from them?

Make 329 Challenge

Can you arrive at 329 by inserting 1, 4, 9, 16 and 25 into the gaps below?

◯×◯×(◯+◯)+◯ = 329

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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