# day/dydd 7 at 7puzzleblog.com

The Main Challenge

Start with the number 7.  Add 1 to this, then 3, then to that answer add 5, then 7 . . . and keep on adding consecutive odd numbers to the previous total.

What is the first answer you reach that is greater than 100?

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 3rd & 4th rows contain the following fourteen numbers:

3   10   13   25   32   35   36   42   44   45   54   60   66   80

What is the sum of the multiples of 11?

The Roll3Dice Challenge

From six of the seven groups of numbers below, it is possible to make today’s target number of 7 when each number in the group is used once and + – × ÷ is available:

•   1   1   5
•   1   4   4
•   2   2   3
•   2   3   3
•   3   4   4
•   3   5   5
•   4   5   6

Which is the only group that CANNOT make 7?

The Mathematically Possible Challenge

Using 45 and 10 once each, with + – × ÷ available, which FOUR numbers is it possible to make from the list below?

9    18    27    36    45    54    63    72    81    90

#9TimesTable

The Target Challenge

Can you arrive at 7 by inserting 1, 3, 6 and 10 into the gaps on each line?

•  ◯+×–◯ = 7
•  ◯×(+) = 7
•  –√(+ = 7
•  (+)²÷(–◯) = 7

Answers can be found here.

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