The milky way is classified as _____

Choose the correct alternative from the given ones that will complete the series.

$169, 144, 121, 100, ?$

Choose the correct alternative from the given ones that will complete the series.

A, P, C, Q, E, R, G, ?, ?

A group of alphabets is given with each being assigned a number. These have to be unscrambled into a meaningful word and correct order of letters be indicated from the given responses.

$$\begin{gathered} E O C N A \\ 1 2 3 4 5 \end{gathered}$$

Find out wrong number in the given series.

$20, 40, 200, 400, 2000, 4000, 8000$.