Which type of operating system is designed to respond to

What should come in place of ? in the given series?

41 45 54 70 95 ?

Select the option in which the pair of letter-clusters share the same relationship as that shared by the given pair of letter-clusters.

TRACK : IAYPR :: ?

What should come in place of the question mark (?) in the given series ?

40   ?   18    10   4    0

Which of the following numbers will replace the question mark (?) in the given series?

3, 7, 5, 61, 363 ?

Select the option that represents the correct order of the given words as they would appear in an English dictionary.

1. Circulate

Read the direction carefully and answer the following question.

What should come in place of? in the given series based on the English alphabetical order?

FNV   LUE  ?   XIW   DPF

What will come in the place of the question mark (?) in the following equation, if '+' and '–' are interchanged and '×' and '+' are interchanged?

Study the given pattern carefully and select the number that can replace the question mark (?) in it.

First row- 9, 21, 124