### Shapes in the Alphabet

In this problem, we're going to find sets of letter shapes that go together.

### Logic Block Collections

What do you think is the same about these two Logic Blocks? What others do you think go with them in the set?

### Our Numbers

These spinners will give you the tens and unit digits of a number. Can you choose sets of numbers to collect so that you spin six numbers belonging to your sets in as few spins as possible?

# I Like ...

##### Stage: 1 Challenge Level:

Mr Gilderdale was using this interactivity with his class:

FULL SCREEN VERSION

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He had thought of a number rule and he asked the class to choose numbers to test.

If the number they chose fitted his rule, he put it under 'I like these numbers'. If the number they chose didn't fit his rule, he put it under 'I don't like these numbers'.

Here is a picture of the game after the class had chosen four numbers:

What could Mr Gilderdale's rule be?
If you were in Mr Gilderdale's class, which number would you choose next to test your idea?
How could you find out Mr Gilderdale's rule in the smallest number of guesses?