APPSC Group 1 Prelims 2023 Paper 2 · Question 1

Question 1 of the APPSC Group-I Prelims 2023 Paper II (8 January 2023). Try it first, then open the answer and explanation.

1. Prelims 2023 · P-II · Q1 · Mental Ability & Reasoning · Numbers & Series

   There are nine 2-digit consecutive odd numbers. If 59 is the mean of the first five such numbers, then what is the mean of all the nine numbers ?

   తొమ్మిది రెండు-అంకెల వరుస బేసి సంఖ్యలు ఉన్నాయి. అలాంటి మొదటి ఐదు సంఖ్యల సగటు 59 అయితే, మొత్తం తొమ్మిది సంఖ్యల సగటు ఎంత ?

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   Answer: 63

   సమాధానం: 63

   The mean of five consecutive odd numbers is the middle one, so the first five are 55, 57, 59, 61, 63; all nine are 55 to 71, whose mean is the middle (5th) number, 63.

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