11. Joey calculated the sum of the largest and smallest two-digit numbers that are multiples of three. Zoë calculated the sum of the largest and smallest two-digit numbers that are not multiples of three. What is the difference between their answers?
A 2
B 3
C 4
D 5
E 6
11. B Joey's two numbers are 99 and 12 and hence his sum is 111 . Zoë's two numbers are 98 and 10 and hence her sum is 108. Therefore the difference between their answers is $111-108=3$.