Verbal Reasoning - Mental Ability Questions

Amar moved 20km towards east in car from his home to reach hospital. From there he turned left and moved 30km and again move 20km left to reach his school. How far is his school from hospital?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
550 x 22 - 24 + 3 = ?

In the following question, select the related number from the given alternatives.
243 : 819 : : 163 : ?

Arrange the given words in the sequence in which they occur in the dictionary.
1. Xenons
2. Xylyls
3. Xanthic
4. Xenians
5. Xyst

Select the related word/letters/number from the given alternatives.
Farmer : Plough:: Painter: ?

In a certain code language, "NATURE" is written as "TANURE". How is "LISTEN" written in that code language?

In a certain code language "CANADA" is written as "BZMBEB". How is "SYDNEY" written in that code language?

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

LT, MS, NR, OQ, ?