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

58, 179, ?, 492, 688

Which of the following letter clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left side of:: is the same as that on the right side of::?
# : KNE :: PQV : %

If 96 C 3 = 32 and 288 C 8 = 36, then 408 C 6 = ?

Subash travelled 15 km. towards East, then turned towards North and travelled 15 km and turned towards West and travelled 15 km. How far is he from the starting point? 

Today is Monday. After 61 days, it will be : 

Direction: Select the related word from the given alternatives.

35 : 34 :: 76 :?

In a line 13 persons are sitting. A is seventh from the beginning and two persons 15. sits between G and A. Persons between A and L is same as persons between G and Q, Then what is the position of Q from the beginning?

In the given figure, how, how many keys are duplication but not steel?