For the following two (02) items:
Let ( 6 + 10 + 14 +... up to m terms) =( 1 + 3 + 5 + 7 +... up to n terms)
where m < 25 and n < 25

How many values of m are possible?

What is the sum of the binary numbers $(10110110) _2$ and $( 10001 1) _2$
 

What is the harmonic mean of the numbers C(10,3) C(10,4) C(10,5) C(10,6) and C(10,7) ?

The sum of the first k terms of a series S is $3k{}^2+5k$. Which one of the following is correct?