What should come in place of the question mark '?' in the following number series?
 2916, 972, ?, 108, 36, 12

In a certain code language, ‘GROUND’ is written as ‘BMJPIY’. What will be the code for ‘FREAK’ in that code language?

In a certain code language, 'RESTRICT' is written as 'CTRISTRE', 'STARTING' is written as 'NGTIARST' and 'MOUNTAIN' is written as 'INTAUNMO'. What is the code for the word 'ENVELOPE' in that code language?

From the given alternative words, select the one which cannot be formed using the letters of the given word.
TAMBOURINE  

Some equations are solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis.
5 × 4 × 3 = 70,
6 × 5 × 4 = 140
7 × 6 × 5 = ?

Choose the odd numeral pair/group in each of the following questions:

Directions: Study the following information carefully and answer the questions given beside:

 4 3 6 3 4 5 9 2 8 7 2 3 6 5 2 7 3 9 1 2 1 8 4 9 8 1 2 4 7 7 5 2

Which element is exactly midway between the sixteenth element from the left end and eleventh from the right end?

Direction : Study the following information carefully and answer the questions given below.
In a certain code language:
“Never talk between others” is coded as “sm nt ro fi”
“Others should be helpful” is coded as “ro el ac jq”
“Never be time specific” is coded as “fi dg el pa”
“Focus between specific hours” is coded as “hy dg nt ks”

What is the code for “specific” in the given code language?