DAY 335:

The Main Challenge

. . . is a tricky number puzzle from Mathematically Possible, our board game that is great for arithmetic and strategy:

Using the numbers 4, 5 and 10 once each, with + – × ÷ available, can you list the TEN different target numbers that are possible to achieve from 1 to 30 inclusive?

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 3rd & 7th columns contain the following fourteen numbers:

4   5   9   12   15   17   24   28   32   35   50   66   80   81

What is the product of the two prime numbers in the list?

The Factors Challenge

Which of the following numbers are factors of 335?

15    20    25    30    35    40    45    None of them

The Mathematically Possible Challenge

Using 29 and 12 once each, with + – × ÷ available, which FOUR numbers are possible to make from the list below?

6    12    18    24    30    36    42    48    54    60

#6TimesTable

The Target Challenge

Can you arrive at 335 by inserting 3, 4, 5, 6 and 7 into the gaps below?

  •  (◯³+◯×(◯–◯))×◯ = 335

Answers can be found here.

Click Paul Godding for details of online maths tuition.

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