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Saturday, 31 October

JEE Main 2022 · MathsNumerical answerNumerical valueHardMulti-step

JEE Main 28 June 2022, Shift 1, Maths Q27

Question 27 of 90 in this shift, Maths question 27 of 30, Section B.

Let A={1,a1,a2.....a18,77}A=\{1, a_1, a_2 ..... a_{18}, 77\} be a set of integers with 1<a1<a2<.....<a18<771<a_1<a_2<.....<a_{18}<77. Let the set A+A={x+y:x,y∈A}A+A=\{x+y: x, y\in A\} contain exactly 39 elements. Then, the value of a1+a2+....+a18a_1+a_2+....+a_{18} is equal to __________.

Official answer

702

NTA final key.

Chapter
Sequences and Series
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.