Study guides

☆☆

Q: How many 2 digit numbers contain the digit 4?

Write your answer...

Submit

Still have questions?

Related questions

-2

21

1

-5

252

It would help to know which digit. 0 appears in 9 numbers and each of the others in 18 numbers.

-2

138 of them.

The answer is 138

There are 175 such numbers.

There are several ways to answer this. I think this is the easiest: Count the number of three-digit numbers: The first digit can be 1-9; the second and third digits can be 0-9. So, there are 9 choices for the first digit and 10 choices for the second and third digits. This gives you 9 x 10 x 10 = 900 three-digit numbers. Right? Then count the number of three-digit numbers that do NOT contain the digit 2. This is done similarly! Try it! Now, if you think about it, the difference between these two quantities IS the number of three-digit numbers that DO contain a 2, which is what you wanted.

There are 45 such numbers.

People also asked