JEE Main 2023 · MathsNumerical answerNumerical valueHardMulti-step

JEE Main 12 April 2023, Shift 1, Maths Q23

Question 23 of 90 in this shift, Maths question 23 of 30, Section B.

Let the digits a, b, c be in A. P. Nine-digit numbers are to be formed using each of these three digits thrice such that three consecutive digits are in A.P. at least once. How many such numbers can be formed?

Official answer

944

NTA final key.

Chapter: Permutations and Combinations
Topic: Permutations and Combinations
Idea tested: Principle of Inclusion-Exclusion in Counting

Same idea in other shifts

Asked 4× in all

26 Jun 2022, Shift 2 · Q25The total number of 3-digit numbers, whose greatest common divisor with 36 is 2, is ______.HardNumerical value
31 Aug 2021, Shift 2 · Q82The number of 4-digit numbers which are neither multiple of 7 nor multiple of 3 is ______________.MediumNumerical value
26 Feb 2021, Shift 2 · Q88The total number of 4-digit numbers whose greatest common divisor with $18$ is $3$ , is __________.MediumNumerical value

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.