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1 March, 07:16

An adult blinks about 450 times in 30 min. A 12 year old blinks about 150 times in 15 min. How many more times does an adult blink in 60 min. than a 12 year old?

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  1. 1 March, 10:31
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    150x2 because 15 minutes is half that of 30

    =300

    then times that by 2 again to get an hour so 600

    then times 450 by 2 to get an hour so 900

    then subtract 600 from 900 which is 300

    300 more times is your answer
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