NSTSE (National Science Talent Search Exam Unified Council) Class 3: Questions 1 of 2041
» Mathematics » Numbers
MCQ▾
Question
How many numbers are there which contain four digits?
Choices
Choice (4)  Response  

a.  9999 

b.  9000 

c.  9099 

d.  1000 

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