The quantitative questions in section B is giving me issues
Please who can help out?

Hmm lets see

Mtchewww...

The B part has typo errors in d example, it's supposed to be, add all to give the middle number,
Example one is correct, 7+3+9=19
Example two and three has errors
6+1/3+0=7 1/3

From the questions you would see that non of them has a smaller number in the middle, showing that the middle number is supposed to be larger than the outer numbers
Secondly whaen you add all the outer numbers you would get the answer in the options given,
Most likely the books are pirated copies, and didn't go through vetting before printing, we see them alot here
No piracy policy or law, nobody checks these days, Nigeria for you.

Cheers