What should come in place of the question mark (?) in the given series? 620 621 624 629 636 ?

In a certain code language, 'ZXFGA' is coded as '3' and 'BTGHASQR' is coded as '6'. What is the code for 'YWNERI' in the given language?

Six people, D, E, F, G, H and W, are sitting in a row facing north(but not necessarily in the same order). Only two people sit between W and D. G sits to the immediate left of D. No one sits to the right of H. Only two people sit between H and G. E sits to the immediate left of G. How many people sit between F and E?

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statements).

Statements:

Some taps are soaps.

Some taps are creams.

Some soaps are oils.

Conclusions:

(I) Some taps are oils.

(Il) Some soaps are creams.

Six people, E, F, G, Q, R and S, are sitting in a row facing north (but not necessarily in the same order) . Only two people sit to the right of R. Only two people sit between R and E. Only one person sits between E and F. F sits to the immediate left of R. S sits to the immediate right of Q. How many people sit between Q and G?

Based on the English alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which letter-cluster DOES NOT belong to that group? (Note: The odd man out is not based on the number of consonants/vowels or their position in the letter-cluster.)

What should come in place of the question mark (?) in the given series based on the English alphabetical order? AFQ BHR CJS DLT?