IGCSE Maths videos

Difference tables for sequences - video lesson

Factors = whole number that can be divided evenly into another number

eg; 12 is a factor of 1  2  3  4  6  and  12

Prime number = whole number greater than one whose only factors are 1 and itself.

Khan Academy - working out indices - video lesson

Corbett Maths - standard form - video lesson

To find 1%: Divide number by 100