What is value placed at Question mark?
10.1: 1.01 ::  0.1: ?

What will come in place of question (?) mark in the following series?
CD     FG     JK     ?        UV

In the following questions complete the number series :
204, 100, 48, 22, ___

A word and number arrangement machine when given an input line of words and numbers rearranges them following a particular rule in each step. The following is an illustration of input and rearrangement.
Input: go now 53 39 18 for again 66
Step 1 : 66 go now 53 39 18 for again
Step 2 : 66 again go now 53 39 18 for
Step 3 : 66 again 53 go now 39 18 for
Step 4 : 66 again 53 for go now 39 18
Step 5 : 66 again 53 for 39 go now 18
Step 6 : 66 again 53 for 39 go 18 now

Step 2 of an input is:   94 car 86 window shut 52 31 house
Which of the following is definitely the input?

A is the brother of B, C is the father of D, E is the mother of B. A and D are brother. How is E related to C?

In a certain code language, CRY is written as MRYC, How is GET written in that language?

Direction: Study the following arrangement carefully and answer the given question below. 

S D 9 5 E # K 6 T I 8 P 1 % A 2 C λ L M U3 W @ N 4 © J $ 7 F B 

In the given series, 1st, 2nd, 3rd element and so on are interchanged with 20th, 19th, 18th element and so on respectively, then which element will be 8th to the left of 20th element from left end?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
_qr_srq_p_rs_r_p