DAY 323

Today’s Challenge

. . . involves repeated subtraction, but can you solve it?

Starting at 100, keep on subtracting 7 until you hit a 2-digit number that has both its digits the same. What is this number?

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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 1st & 7th columns of the playing board contain the following fourteen numbers:

5     9     13     21     22     24     27     28     32     50     55     56     60     66

Which two numbers, when 9 is added to each, become square numbers?

.

Answers

. . . can be found when clicking this.

7puzzleblog

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