Verbal Reasoning - Mental Ability Questions

If + means division, ­ means multiplication, '÷' means subtraction, x means addition, and < means less than, then which of the following is false?

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

What is total number of triangles in the given figure?

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, ?

Select the odd word/letters/number/number pair from the given alternatives.

Courtroom : Judge :: Stadium : ___

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