Estimate something, then check it

Guess a quantity, work out a reasoned estimate, then look up the real figure.

Why it helps

Estimating trains reasoning and shows how far off your intuition is. Seeing the gap helps you calibrate over time.

How to do it

1. Choose a question such as how many windows are in your street.
2. Break it into parts and estimate each one.
3. Check the real answer and compare.

Make it easier

Estimate how long a task will take.

Make it harder

Estimate five things and track how close you got.