What is Sumit's position from the right end in a row of children?
Statements:
1. There are 10 children between Sumit and Rajan.
2. Rajan is twentieth from the left end of the row of children.
Answer: D
Clearly, neither the number of children in the row is given nor the position of Sumit relative to Rajan is mentioned in any one of 1 or 2.