# day/dydd 330 at 7puzzleblog.com

The Main Challenge

This is a number trail involving ten arithmetical steps. Be careful with your calculations – and no calculators please!

• multiply by 4
• +10%
• subtract 15
• divide by seven
• 1/2 of this
• +87
• double this
• 96
• ÷10

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 & 4th columns contain the following fourteen numbers:

3   6   13   20   21   22   27   42   55   56   60   63   72   77

What is the product of the highest number and lowest number?

The Factors Challenge

Which is the ONLY number below that is not a factor of 330?

2    3    5    6    9    10    11    15

The Mathematically Possible Challenge

Using 56 and 12 once each, with + – × ÷ available, which FIVE numbers is it possible to make from the list below?

2    3    5    7    11    13    17    19    23    29

The Target Challenge

Can you arrive at 330 by inserting 3, 5, 10, 11 and 15 into the gaps below?

•  ◯×◯×(◯–◯–◯) = 330