Find the invalid no.from the following series 13, 18, 25, 30, 37, 40
Choose one.
A) 13
B) 18
C) 40
D) 30
E) 37
The differences between two successive terms from the beginning are 7, 5, 7, 5, 7, 5. So, 40 is wrong.   40
<result>C</result>
Find the invalid no.from the following series 13, 18, 25, 30, 37, 40