### Pebbles

Place four pebbles on the sand in the form of a square. Keep adding as few pebbles as necessary to double the area. How many extra pebbles are added each time?

### It Figures

Suppose we allow ourselves to use three numbers less than 10 and multiply them together. How many different products can you find? How do you know you've got them all?

### Bracelets

Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?

# Times Tables Shifts

##### Stage: 2 Challenge Level:
The numbers in the five times table are:
5, 10, 15, 20, 25 ...

I could shift these numbers up by 3 and they would become:
8, 13, 18, 23, 28 ...

In this activity, the computer chooses a times table and shifts it.
Can you work out the table and the shift each time?

Can you explain how you worked out the table and shift each time, and why your method will always work?

Level 1 includes tables up to 10.
Levels 2 and 3 include tables up to 20.
On levels 1 and 2, the numbers will always be the first five numbers in the times table.
On level 3, the numbers could be any five numbers from the shifted times table.

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