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Saturday, 31 October

Same idea in other shifts

Asked 13× in all
  1. 3 Apr 2025, Shift 1 · Q21If the number of seven-digit numbers, such that the sum of their digits is even, is m⋅n⋅10nm \cdot n \cdot 10^n;…MediumNumerical value
  2. 8 Apr 2024, Shift 1 · Q23The number of 3-digit numbers, formed using the digits 2, 3, 4, 5 and 7, when the repetition of digits is not allowed, and which are not…MediumNumerical value
  3. 1 Feb 2024, Shift 2 · Q22The lines L1,L2,…,L20L_1, L_2, \ldots, L_{20} are distinct. For n=1,2,3,…,10n=1,2,3,\ldots,10 all the lines L2n−1L_{2n-1} are parallel to each other and all the…MediumNumerical value
  4. 13 Apr 2023, Shift 2 · Q22Total numbers of 3-digit numbers that are divisible by 6 and can be formed by using the digits 1, 2, 3, 4, 5 with repetition, is ______MediumNumerical value
  5. 26 Jul 2022, Shift 2 · Q23Numbers are to be formed between 1000 and 3000, which are divisible by 4, using the digits 1, 2, 3, 4, 5 and 6 without repetition of…MediumNumerical value
  6. 27 Jul 2022, Shift 1 · Q28Let SS be the set containing all 3×33 \times 3 matrices with entries from {−1,0,1}\{-1, 0, 1\}. The total number of matrices A∈SA \in S such that…HardNumerical value
  7. 28 Jul 2022, Shift 1 · Q21Let S be the set of all passwords which are six to eight characters long, where each character is either an alphabet from {A,B,C,D,E}\{A,B,C,D,E\}…MediumNumerical value
  8. 25 Jun 2022, Shift 1 · Q29Let A be a 3×33\times3 matrix having entries from the set {−1,0,1}\{-1,0,1\}. The number of all such matrices A having sum of all the entries…HardNumerical 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.