📘 11+ Maths Formulae Guide
Revise the essential rules and formulae for 11+ number, ratio, geometry, measures, angles, probability, money, time and data questions.
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⭐ Must-Memorise Conversions
1 km = 1,000 m
1 m = 100 cm
1 cm = 10 mm
1 kg = 1,000 g
1 litre = 1,000 ml
1 hour = 60 minutes
1 minute = 60 seconds
£1 = 100p
1 week = 7 days
1 year = 12 months
Half-turn = 180°
Full turn = 360°
Revision note: Read every question carefully, identify the required formula,
convert units before calculating and check that the final answer is sensible.