Verbal Reasoning - Mental Ability Questions

Students are sitting in a row in which the position of X is 17th from the left and that of Y is 14th from the right. If they interchange their positions, X's position becomes 7th from the left. How many students are there in the row?

From the given alternative words, select the word which cannot be formed using the letters of the given word:

ENVIRONMENT

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

Red, Orange, Yellow, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

AED, EIH, INL, ?, QAT

Select the number which can be placed in the place of ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

HTC, LXG, PBK, TFO, ?

How many 6's are there in the following sequence that are immediately preceeded by 3 but not immediately followed by 0?

3 6 9 0 6 9 3 6 9 3 6 6 3 6 0 6 3 3 6 0

From the given alternative words, select the word which cannot be formed using the letters of the given word:
ECCENTRICITY