Find the odd man out. 21, 28, 35, 42, 49, 51, 56
Choose the most appropriate option.
A) 21
B) 28
C) 35
D) 42
E) 51
All numbers except 51 are multiples of 7   Answer is 51
<result>E</result>
Find the odd man out. 21, 28, 35, 42, 49, 51, 56