Mr. Matheson has four cards, numbered 1, 2, 3, 4. He gives one card each to Ben, Wendy, Riley, and Sara. Ben is not given the number 1. Wendy's number is 1 greater than Riley's number. Which number could Sara not have been given?
Since Ben is not given the number 1 , he is given the number 2,3 or 4 .

Since Wendy's number and Riley's number are one apart, then their numbers are consecutive. Note that Wendy's number is 1 greater than Riley's number.

If Ben is given 2, then Riley and Wendy must be given 3 and 4 . In this case, Sara gets 1.

If Ben is given 3, then Riley and Wendy must be given 1 and 2. In this case, Sara gets 4.

If Ben is given 4, then Riley and Wendy must be given 1 and 2 , or 2 and 3 . In the first of these cases, Sara must be given 3. In the second of these cases, Sara must be given 1.

Therefore, Sara can be given 1, 3 and 4, and so cannot be given the number 2 .

ANSWER: 2