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Square and Square Roots — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSSquare and Square Roots1 Mark
MCQ
How many natural numbers lie between $9^2$ and $10^2?$
  • A
    $19$
  • B
    $17$
  • C
    $20$
  • ✓
    $18$
✓

Answer

Correct option: D.
$18$
The number of natural numbers between $n^2$ and $(n + 1)^2$ is equal to $2n.$
Here, $n = 9$
Therefore,$ 2n = 2 \times 9 = 18$

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