Class 9 Mathematics · Chapter 2 · Test 1
Scientific Notation
35 MCQs
34 questions · 30 min · 34 marks
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Sample questions
The first 5 of 34. Try each one, then tap to see the answer.
Question 1
What is scientific notation used for?
- AWriting numbers only as fractions
- BExpressing very large or very small numbers compactly
- CRemoving all decimal points
- DConverting all numbers to integers
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Answer: B
Scientific notation expresses numbers as a coefficient multiplied by a power of ten.
Question 2
Which is the general form of scientific notation?
- Aa+10n
- Ba times 10 to the power n
- Ca divided by 10 plus n
- D10a+n
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Answer: B
Scientific notation has the form a times 10 to the power n.
Question 3
What condition must the coefficient a satisfy in standard scientific notation?
- A0 less than a less than 1
- B1 less than or equal to a less than 10
- Ca greater than 10
- Da equals 10
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Answer: B
The coefficient is at least 1 but less than 10.
Question 4
In scientific notation what can the exponent n be?
- AOnly positive
- BOnly negative
- CAny integer
- DOnly zero
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Answer: C
The exponent may be positive negative or zero.
Question 5
What is the scientific notation of 2000000?
- A2 times 10 to the power 5
- B2 times 10 to the power 6
- C20 times 10 to the power 5
- D0.2 times 10 to the power 7
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Answer: B
Moving the decimal six places left gives 2 times 10 to the power 6.
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