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

(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 - Operations on 13 such as adding/Subtracting/multiplying etc, to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed) 

(15, 21, 10)

(25, 36, 17)

Select the number from among the given options that can replace the question mark (?) in the following series. 85, 84, 92, 65, 129, ?

With reference to the PM CARES Fund, consider the following statements:

In a certain language, if the signs + and ×, and the digits 3 and 8 are interchanged, then what is the value of the following expression?

Select the number from among the given options that can replace the question mark (?) in the following series.

86, 89, 95, 104, ?, 131, 149

Which answer figure will replace the question mark given in the question  figure?  

Questions figure: