The number of terms of an A.P is odd

MATHEMATICS · Single correct · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

The number of terms of an A.P is odd. The sum of the odd terms (1st,3rd1^{\text{st}}, 3^{\text{rd}} etc.,) is 248 and the sum of the even terms is 217. The last term exceeds the first by 56, then : (a) the number of terms is 17 (b) the first term is 3 (c) the number of terms is 13 (d) the first term is 1

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