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JEE Main 2024 (8 Apr, Shift 1) · Significant Figures & Order of Magnitude

Significant Figures & Order of Magnitude question from JEE Main 2024 (8 Apr, Shift 1)

Q6JEE Main 2024 · 8 APR · SHIFT 1Easy

Significant Figures & Order of Magnitude

In an expression $a \times 10^{b}$ :

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Answer: (b)

Write the number as $a \times 10^{b}$ with $1 \le a < 10$ .
If $a \le 5$ the order of magnitude is $b$ ; if $a > 5$ it is $b + 1$ .
So the answer is (b).

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