Verbal Reasoning - Mental Ability Questions

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

I N T E L L I G E N C E

Select the missing number?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1, 7, 42, 210, 840, ?

Three words in bold letters are given in each question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description about these three words.

knot: Watt: Fathom

If 'whom' means 'x', 'she' means '/', 'will' means '+' and 'come' means '-', then what will the value of ' 8 when 12 will 16 she 2 come 10'?

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

CM, EK, GI, ?

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

Beijing Olympics, London Olympics, Rio Olympics, ?

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

RT, ? , ZB , DF