### Consecutive Numbers

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

### Calendar Capers

Choose any three by three square of dates on a calendar page...

### Building Tetrahedra

Can you make a tetrahedron whose faces all have the same perimeter?

# Fractions of 1000

##### Stage: 3 and 4 Short Challenge Level:
When multiplying the fractions together, the denominator of each fractio, apart from the last, cancels with the numerator of the next fraction.

We are left with the numerator 1 from the first fraction and the denominator 10 from the last, which gives $\frac{1}{10}$ of $1000$, i.e. $100$

This problem is taken from the UKMT Mathematical Challenges.
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