IBM Company Numerical Ability Data Sufficiency

What is the difference between the present ages of Ayush and Deepak?
I. The ratio between Ayush's present age and his age after 8 years 4:5.
II.The ratio between the present ages of Ayush and Deepak is 4 : 3.
III.The ratio between Deepak's present age and his age four years ago is 6 : 5.

A. Any two of I, II and III
B. I or III only
C. Any one of the three
D. All I, II and III are required
E. Even with all I, II and III, the answer cannot be obtained.

Read Solution (Total 1)

suppose ayush age is x,
deepak's age is y,then
I.x/(x+8)=4/5 =>32
II.x/y=4/3
III.y/(y-4)=6/5 =>24
hence by solving any two equations ans would be 8
option is A
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IBM Other Question

48 students have to be seated such that each row has the same number of students as the others. If at least 3 students are to be seated per row and at least 2 rows have to be there, how many arrangements are possible? What will be the ratio between ages of Sam and Albert after 5 years?
I.Sam's present age is more than Albert's present age by 4 years.
II.Albert's present age is 20 years.
III.The ratio of Albert's present age to Sam's present age is 5 : 6.

A. Any two of I, II and III
B. II only
C. III only
D. I or III only
E. II or III only