In the series A, B, C, D, E, F, G, H, I, J, how many times does the letter 'E' occur?

A. 1

Find the missing letter in the series: b, d, f, h, ?

A. J

A is the brother of B. C is the sister of A. How is C related to B?

A. SISTER

If X + Y means X is the uncle of Y, X - Y means X is the aunt of Y, and X × Y means X is the cousin of Y, what is the relationship of Z to W if Z - W and W + Z are true?

A. Z IS W'S AUNT

What is the next letter in the series: A, C, E, G, ?

A. I