Find the invalid no.from the following series 13, 18, 25, 30, 37, 40
Choose the correct answer
A) 30	B) 35	C) 40	D) 47	E) 50
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