NSTSE (National Level Science Talent Search Examination) Class 3: Questions 1 of 1743

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Question

How many numbers are there which contain four digits?

Choices

Choice (4) Response

a.

9999

b.

9000

c.

9099

d.

1000

Topic iScore

Ques. Time

Answer

b.

Explanation

  • The numbers from 1000 to 9999 are having four digits.
  • So, (greatest 4-digit number) – (least 4 –digit number) +1
  • Greatest 4-digit number = 9999
  • Least 4 –digit number = 1000
  • = 9999 - 1000 + 1
  • = 8999 + 1
  • = 9000
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