Question

Imagine some coloured blocks are laid out in a row: three red, two blue, three red, two blue and so on. If there are 65 coloured blocks, how many would be red?

Please explain how you got your answer.

Answer 1

Given :  coloured blocks are laid out in a row: three red, two blue, three red, two blue and so on

there are 65 coloured blocks

To Find :  how many would be red

Solution:

Red = 3

Blue = 2

Total = 5

Hence for every 5 there are 3 Red

For total 5 , numbers of Red  = 3

=> For total 1 , numbers of Red  = 3/5

=> For total 65 , numbers of Red  = 65 * 3/5  = 39

There are 39 Red Blocks

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