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Mathematics average

Roshan Azeez
26/08/2018 0 0

Que : Average of 5 consecutive even numbers is 12 . Find the sum of 1st and last numbers.

 

Sol : shortcut...  If consecutive numbers average is given, then average is (1st + last)/2 = 12

Therefore sum of 1st and last = 12*2 = 24

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