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Maths CBSE Live product
Class 8 (2025-26)
A Square and A Cube
Annual Revision IV - A Square and A Cube
3.
Determine the square of a number
Question:
3
m.
We can find out whether a number is a perfect square by successively subtracting odd numbers.
Using the pattern above,
calculate
36
\(^2\), given that
\(35^2 = 1225\)
1301
1292
1307
1296
How do we find the
36
\(^{th}\) odd number?
By adding \(35^{th}\) odd number to \(1225\)
By adding \(38^{th}\) odd number to \(1225\)
By adding \(36^{th}\) odd number to \(1225\)
By adding \(34^{th}\) odd number to \(1225\)
What is the \(n^{th}\) odd number?
\(2n-1\)
\(2n\)
\(n^2\)
\(2n+1\)
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