Which Is Bigger?

Rules

1. A 3-second countdown, then the GO signal.
2. Two sums face off, one on each side.
3. Point at the bigger one with the 1 and 2 keys or by clicking.
4. You get 45 s from the signal.

How scoring works

Every right answer scores, more the faster you answer, and every wrong one costs you.

Levels

• Gold level1,900 points
• Silver level1,300 points
• Bronze level700 points

Levels are earned by result; medals are only for the CCI Olympics.

Tips

• Compare by eye before working anything out: often one is clearly bigger.
• When in doubt, rule out: the last digit is often enough to tell which one it is not.

Event ranking

See the full ranking