The sum

The sum of five consecutive odd numbers is 75. Find out the sum of the second and fourth of them.

Correct result:

s =  30

Solution:

 x+(x+2)+(x+4)+(x+6)+(x+8)=75  5x=55  x=11   s=(x+2)+(x+6)=(11+2)+(11+6)=30



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