Question
Download Solution PDFWhich of the following numbers will replace the question marks (?) in the given series?
20, 30, 42, 56, ?, 90
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe pattern followed here is,
Hence, the correct answer is "72".
Alternate Method
The pattern followed here is,
4 × 5 = 20
5 × 6 = 30
6 × 7 = 42
7 × 8 = 56
8 × 9 = 72
9 × 10 = 90
Hence, the correct answer is "72".
Alternate Method
The pattern followed here is,
42 + 4 = 20
52 + 5 = 30
62 + 6 = 42
72 + 7 = 56
82 + 8 = 72
92 + 9 = 90
Hence, the correct answer is "72".
Last updated on Jul 1, 2025
-> SSC JE Electrical 2025 Notification is released on June 30 for the post of Junior Engineer Electrical, Civil & Mechanical.
-> There are a total 1340 No of vacancies have been announced. Categtory wise vacancy distribution will be announced later.
-> Applicants can fill out the SSC JE application form 2025 for Electrical Engineering from June 30 to July 21.
-> SSC JE EE 2025 paper 1 exam will be conducted from October 27 to 31.
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