NIELIT 2016 DEC Scientist B - Section A: 23

Question

In the following question, one term in the number series is wrong. Find out the wrong term.

$125, 126, 124, 127, 123, 129$

• A. $123$
• B. $124$
• C. $126$
• D. $129$

Answer 1

The correct pattern is $+1, -2, +3, -4, +5$

• $125+1=126$
• $126-2=124$
• $124+3=127$
• $127-4=123$
• $123+5=128$

So,$129$ is the wrong term here.