Verbal Reasoning - Mental Ability Questions

If "–" stands for division, "+" stands for multiplication, "÷" stands for subtraction and "×" stands for addition, which of the following equations is correct?

Ravish is 7 years older than Vikas. Akash is 3 years younger than Ravish. Mohit is 5 years younger than Akash. Who is the youngest among all the four?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1, 5, 30, 210, 1680, ?

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

NVX, LTV, JRT, ?, FNP

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

FU, HS, JQ, ?

Looking at a lady, Joey said, "She is the mother of my mother's mother-in-law's husband". How is the lady related to Joey's father?

Select the missing number.

If '+' means '÷', '−' means '×' , '÷' means '+' and '×' means '−' , then 36×12+4÷6+2−3= ?