### 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...

### Latin Numbers

Can you create a Latin Square from multiples of a six digit number?

# Triangle of Squares

##### Stage: 3 Short Challenge Level:

If the pattern shown is continued, what number will appear directly below $400$?

$1$
$2$   $3$    $4$
$5$    $6$   $7$    $8$    $9$
$10$  $11$  $12$  $13$  $14$  $15$  $16$

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.

This problem is taken from the UKMT Mathematical Challenges.
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