23. Q is as much younger than R as he is older than T. If the sum of the ages of R and T is 50 years, what is definitely the difference between R and Q's age ?
A. 1 year B. 2 year
C. 25 year D. Data inadequate
Answer:
R - Q = R - T Q = T.
Also, R + T = 50
‹=› R + Q = 50.
So, (R - Q) cannot be determined.
