Verbal Reasoning - Mental Ability Questions

Find the missing number from the given options?

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.

RS, WX, BC, ?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
642 x 6 ÷ 25 + 4 = ?

Pointing to a woman in the photograph Arun said, “She is the wife of the only child of my father”. How is the woman related to Arun?

'Battery' is related to 'Terminals' in the same way as 'Magnet' related to ___.

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

2, 7, 14, 23, 34, ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
Cell, Tissue, Organ, ?