State true or false.

There are a total of ‘900’ 4-digit numbers.

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True

False

answer is B.

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Detailed Solution

Given to find the number of 7-digit numbers.
We know that between the highest 4-digit number and the smallest 4-digit number are all the 4-digit numbers.
Thus, finding the highest and smallest 4-digit number respectively.
The highest 4-digit number is 9999 and the smallest 4-digit number is 1000.
Now, the total number of 4-digit numbers will be the difference of the highest and smallest 4-digit number plus one.
That is, (9999-1000) +1 = 8999 +1
= 9000
Therefore, there are a total number of ‘9000’ 4-digit numbers.
Hence, the given statement is wrong.
The correct statement is “There are a total of ‘9000’ 4-digit numbers”.
Thus, the correct option is 2.

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