Find the odd letters from the given alternatives.

Find the odd word/letters/number from the given alternatives.

Select the related word/letters/numbers from the given alternatives:

5 : 30 :: 7 : ?

Select the related word/letters/numbers from the given alternatives:

BFJ : NRV :: DHL :?

Select the related word/letters/numbers from the given alternatives:

Summer : Aestivation :: Winter : ?

Which of the numbers given below is NOT rational?

What will come in the place of question mark (?) in the below series?

How many triangles are there in the following figure?