Verbal Reasoning - Mental Ability Questions

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

c_e_cd_f_de_

In a certain code language, '÷' represents '+', '-' represents 'x', '+' represents '÷' and 'x' represents '-'. Find out the answer to the following question.

20 x 12 ÷ 3 - 40 + 12 = ?

Select the missing number from the given alternatives?

If '+' means 'brother of', 'x' means 'mother of', '-' means 'father of' and '/' means 'son of', then which of the following means V is nephew of W?

If 5Δ1 = 40, 9Δ9 = 0 and 7Δ1 = 60, then find the value of 4Δ9 = ?

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
U, T, R, O, K ?

In the following question, select the missing number from the given series.47, 44, 40, 37, ?, 30

In a certain code language, “Mayank is happy” is written as “ku tap pi”, “happy are make” is written as “tap le fu” and “make is happy” is written as “fu pi tap”. What is the code for “happy” in that code language?