NIELIT 2016 DEC Scientist B - Section A: 45

Question

Find out the wrong term from the following series and select the number from the alternatives which will replace the wrong term in the series.

$2,9,28,65,126,216,344:$

• A. $38$
• B. $217$
• C. $356$
• D. $66$

Answer 1

The given series is $2,9,28,65,126,216,344$

• $2=1^{3}+1$
• $9=2^{3}+1$
• $28=3^{3}+1$
• $65=4^{3}+1$
• $126=5^{3}+1$
• $6^{3}+1=216+1=217$
• $344=7^{3}+1$

$\therefore$ Wrong number in the series is $216.$

So, the correct answer is $(B).$