exam Maths Puzzle Numerical Ability

which of the following CANNOT be the average ( arithmetic mean) of four positive even integers

A)1
B)2
C)6
D)9
E)12

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exam Other Question
A string is stretched corner to corer on a floor tiled with square tiles. If the floor is 28 tiles long and 35 tiles wide, over how many tiles does the string cover? Hi please help me with this


X-1/3 + x+2/6=6


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