If not, a sequence of tests using a type of mathematics called modular arithmetic is carried out.

ECONOMIST: Number theory

He's now 15 runs away from breaking that unhappy sequence of 18 Tests without a hundred.

BBC: Jonathan Agnew column

Victory at Twickenham on Saturday would be New Zealand's 13th in 15 Tests since the start of June, a sequence that yielded a fourth straight Tri-Nations title despite a last-minute home defeat by South Africa and a humbling by Australia in Sydney.

BBC: Carter eyes 'grand slam' send-off