the sum of 5th and 21th term of A.P. is equal to the sum of 8th , 15th and 13 th term . find the term which is 0	Choose one
A) 11 B) 10 C) 12 D) 13 E) 14
t5 + t21 = t8 + t15 + t13   =&gt; a+4d + a+20d = a+7d + a+14d + a+12d   =&gt; a + 9d = 0   =&gt; t10 = 0 i.e. 10th term is zero.   ANSWER: 10
<result>B</result>
the sum of 5th and 21th term of A.P. is equal to the sum of 8th , 15th and 13 th term . find the term which is 0