Question

Ram has 4 sons first son name is 25 second ones name is 50 nd fourth one is 100 what is the third one names

Answer 1

third son name is 75

=> first son name 25

=> second sons name is is 50 = 25 + 25 = 50

=> forth son name is 100 so = 100 - 25 = 75  

or      

50 + 25 = 75 answer

Answer 2

The names of the all 4 sons of Ram are in increasing uniform proportion . . Hence, 1st one :- 25 2nd one :- 50 3rd one :- 75 4th one :- 100 . . Your answer is 75. Cheers!