DAY 340:

Today’s Challenge

List the only two numbers below 100 that have exactly 10 factors.

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

2    5    9    10    16    24    28    32    33    45    48    50    66    70

What is the sum of the multiples of 9?

Make 340 Challenge

Can you arrive at 340 by inserting 3, 4, 5, 10 and 17 into the gaps below?

◯×◯×(◯+◯)÷◯ = 340

Answers can be found here.

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