Indices show where a number has been multiplied by itself, eg squared or cubed, or to show roots of numbers, eg square root. Check your understanding of the process with this National 5 Maths quiz.
The ratio of the number of yellow circles to the number of white circles is 1 : 4. For each yellow circle there are 4 white circles. The ratio 3 : 12 is equivalent to 1 : 4 because for each yellow ...
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