Every answer passes four checks before it goes live.

A past DU paper

Any question, as printed.

Copied twice

Two separate copies are made of each question. They must match.

Checked

Every figure and rule, against the Act or the standard.

Worked again

Numerical answers are solved a second time, blind. Both totals must agree.

Reviewed

Read in full by an independent reviewer. Anything flagged goes back.

Live

2,093 answers

549 answers are inside these checks right now. Until they pass, their papers say “Being checked”. The answer shown here