DAY 228:

Today’s Challenge

You have been given a starting number as well as an end answer. There are seven arithmetical steps in all, but the middle step is missing!

Start with the number 7, then:

2      ×4      +1      ?      ×5      ÷3      +2      =      7

The missing step involves a single-digit whole number.  Work out this missing step so the final answer will also be 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 1st & 7th rows of the playing board contain the following fourteen numbers:

2    4    9    11    14    15    22    24    27    30    40    70    72    77

Which four different numbers above have a sum of 100?

Make 228 Challenge

Can you arrive at 228 by inserting 3, 4, 5 and 6 into the gaps below?

◯×(◯²+◯²–◯) = 228

Answers can be found here.

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