significant number questions with solutions

Showing 1–10 of 46 questions

• MCQeasyUnit dimension and errorsignificant number

  Using significant-figure rules, evaluate 4.52 × 2.1.

  Options

  • Option A

    9.492

  • Option B

    9.49

  • Option C

    9.5

  • Option D

    10

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• MCQeasyUnit dimension and errorsignificant number

  A measured length is written as 2.500 m. This notation indicates:

  Options

  • Option A

    1 significant figure

  • Option B

    2 significant figures

  • Option C

    3 significant figures

  • Option D

    4 significant figures

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• MCQeasyUnit dimension and errorsignificant number

  If π is approximated as 3.14 in a calculation, how many significant figures does this approximation have?

  Options

  • Option A

    2

  • Option B

    3

  • Option C

    4

  • Option D

    Infinite

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• MCQeasyUnit dimension and errorsignificant number

  Round 8.7462 to 3 significant figures.

  Options

  • Option A

    8.74

  • Option B

    8.75

  • Option C

    8.746

  • Option D

    8.70

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• MCQeasyUnit dimension and errorsignificant number

  The number 2.300 × 10⁵ contains how many significant figures?

  Options

  • Option A

    2

  • Option B

    3

  • Option C

    4

  • Option D

    5

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• MCQeasyUnit dimension and errorsignificant number

  Which of the following has exactly 3 significant figures?

  Options

  • Option A

    0.00520

  • Option B

    0.05020

  • Option C

    5.020

  • Option D

    520.0

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• MCQeasyUnit dimension and errorsignificant number

  A rectangle has measured length 12.4 cm and breadth 3.2 cm. Its area should be reported as:

  Options

  • Option A

    39.68 cm²

  • Option B

    39.7 cm²

  • Option C

    40 cm²

  • Option D

    4.0 × 10¹ cm²

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• MCQeasyUnit dimension and errorsignificant number

  How many significant figures are present in 0.004560?

  Options

  • Option A

    3

  • Option B

    4

  • Option C

    5

  • Option D

    6

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• MatchmediumUnit dimension and errorsignificant number

  Match each operation or situation in List 1 with the correct reporting rule in List 2 and choose the correct option.

  List 1

  1. Addition of measured quantities

  2. Multiplication of measured quantities

  3. Exact counted number

  4. Writing 200 with exactly 3 significant figures

  List 2

  1. Infinite significant figures

  2. Use least number of decimal places

  3. 2.00 × 10²

  4. Use least number of significant figures

  Options

  • Option A

    P-2, Q-4, R-1, S-3

  • Option B

    P-4, Q-2, R-1, S-3

  • Option C

    P-2, Q-1, R-4, S-3

  • Option D

    P-3, Q-4, R-1, S-2

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• MCQeasyUnit dimension and errorsignificant number

  For the mathematical constant π used without approximation, the number of significant figures is:

  Options

  • Option A

    1

  • Option B

    3

  • Option C

    4

  • Option D

    Infinite

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