Ashok's mother was 3 times as old as Ashok 5 years ago. After 5 years she will be twice as old as Ashok. How old is Ashok today?
10 years
15 years
20 years
25 years
Answer: Option B.
ago
3(x-5) = (y-5)
⇒ 3x - 15 = y - 5
⇒ 3x - y = 10 ....(i)
5 years hence,
2 (x + 5) = (y + 5)
⇒ 2x + 10 = y + 5
⇒ 2x - y = -5 ....(ii)
From equations (i) and (ii)
M is the son of P. Q is the grand¬ daughter of O who is the husband of P. How is M related to O?
Son
Daughter
Mother
Father
Answer: Option A.
O is the husband of P. M is the son of P. Therefore, M is the son of O.
In a row of boys, Srinath is 7th from the left and Venkat is 12th from the right. If they interchange their positions, Srinath becomes 22nd from the left. How many boys are there in the row?
19
31
33
34
Answer: Option C. Total number of boys in the row = 22 +12 - 1 = 33