Which number replaces the question mark in the given figure?

$2$	$1$
$4$	$21$

 

$8$	$3$
$5$	$98$

 

$6$	$?$
$3$	$94$

 

Which is the missing term of the below sequence?

$002 B, 009 I, 028 J, \_\_\_\_\_, 126 L$.

Direction: Complete the given analogy by choosing the correct group from the given alternatives

B F I D L : N R U P X :: A J E K C : ?

The vowels of English are coded by their letter numbers appearing as two-digit and then reversed. Thereafter these numbers are represented through a Pie diagram. What will be the central angle (nearest to degree) of the sector representing '$U$'?

In the word $\text{'}\mathrm{PACEMAKING}\text{'}$, if the first letter is interchanged with the second letter, the third letter is interchanged with the fourth letter and so on till the ninth letter is interchanged with the tenth letter, what would be the seventh letter from the right after such arrangement?

In the following letter series, find the letters to replace the question-mark(?) to complete the series:

$\mathrm{ZXW} \mathrm{VTS} \mathrm{RPO} \mathrm{NLK} ? \mathrm{FDC}$

Complete the series:

$\mathrm{Z}=2197, \mathrm{R}=729, \mathrm{P}=512, \mathrm{J}=?$

In a certain way,

DIAMOND is coded as $\left[2233113352722\right]$ 

BRONZE is coded as $\left[223335272135\right]$

then SILVER will be coded as

In the word 'QUARANTINE', which letter comes seven letters before the letter which comes four letters after the second appearance of the first letter to occur twice times in the word?