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Maths CBSE Live product
Class 8 (2026-27)
Number Play - Textbook Aligned Version
Factors, Mulitples, Algebraic Reasoning, Sometimes/Always/Never
6.
Prove the multiples
Question:
2
m.
Prove that the sum of two multiples of \(5\) is also a multiple of \(5\).
Proof
:
Let the numbers are
\(5a\)
\(5-a\)
\(a+5\)
and
\(5-b\)
\(5b\)
\(5b\)
.
Sum \(=\)
\(a+b+5\)
\(5a+5b\)
\(10+a+b\)
\(=\)
\(25ab\)
\(5+a+b\)
\(5(a+b)\)
, which is divisible by
5
10
25
.
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