Verbal Reasoning - Mental Ability Questions

Choose out the odd one

2, 16, 3, 81, 4, ?

9 tens 10 ones equals

Three of the following four are alike in a certain way and hence form a group. Which is the one that does not belong to that group?

7/9 of the people present in a hall are sitting in 9/13 of the chairs available and the rest are standing. If there are 28 empty 9 sitting chairs, how many chairs would have been still empty if everyone in the hall was sitting?

In a certain code language, “book is tough” is written as “fu la mi”, “tough can easy” is written as “fu muk po” and “easy not book” is written as “ti po la”. What is the code for “tough” in that code language?

a _ c _ abb _ a _ bc _ bc _ ab

Read each sentence to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence.

In which part of the sentence there is an error ?