यदि (a=20q+3), तो (a-5) को (20) से भाग देने पर सही शेषफल क्या होगा?
If (a=20q+3), what is the correct remainder when (a-5) is divided by (20)?
Explanation opens after your attempt
Correct Answer
A. (18)
Concept
(a-5=20q-2), but the remainder cannot be negative.
Why this answer is correct
(20q-2=20(q-1)+18), so the correct remainder is (18).
Exam Tip
If a negative remainder appears, reduce the quotient by one and make the remainder positive. चरण 1: (a-5=20q-2) मिलता है, पर शेषफल ऋणात्मक नहीं हो सकता। चरण 2: (20q-2=20(q-1)+18), इसलिए सही शेषफल (18) है। चरण 3: ऋणात्मक शेषफल दिखे तो भागफल एक घटाकर शेषफल धनात्मक बनाएं।
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