How many litres of pure acid are there in 8

Select the number combination of letters that when placed sequentially in the blanks of the given series will complete the series.

Select the option that is related to the fourth number in the same way as the first number is related to the second number.

12 : 96 :: ? : 800

Select the option that is NOT like the given set.

(8, 40, 56)

Select the option in which the pair of words is not related in the same way as the pair of words clusters given below.

Abundant: Plentiful

"Vanish" is related to "Disappear" in the same way as "Prudent" is related to "____".

Select the set in which the numbers are related in the same way as are the numbers of the following sets.

If 45 @ 6 = 81 and 78 @ 9 = 159, then 115 @ 11 = ?

Select the option that is related to third cluster in the same way as the first cluster is related to the second cluster.

KNIFE: 45 :: NAIVE: ?