A test of simple maths skills taken by teachers from schools across the country has revealed a "shocking" lack of mental arithmetic ability and basic maths knowledge.

Only four out of 10 teachers could work out that 2.1 per cent of 400 is 8.4. Only a third knew that 1.4 divided by 0.1 is 14, and less than 50 per cent could work out that a half divided by a quarter is 2.

via Telegraph