# math

posted by .

how many possible 3 digit numbers are there that have a middle zero? how many possible 4 digit numbers are there that have two middle zeros? Explain your answears

• math -

In the first case, you are free to choose only the first and lat digits. The first digit must start with 1 and there are 9 of them. The last digit can start with any number 0 to 9, and there are 10 of them. That makes the number of possibilities 9x10 = 90

Try your own hand at the second one. There are a lot of similarities with the first.

• math -

0- 900 = 90 x 100 = 9000

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### MATH Trouble

I have no idea what this problem means: For how many two-digit numbers if the ones digit larger than the tens-digit?
2. ### Number Sentence

In a 4-digit number, the two greatest place-value digits are 2. The sum of the ones and tens digits is 14. What numbers are possible?
3. ### Calculus

Form two four-digit numbers from the digits 2, 3, 4, 5, 6, 7, 8, and 9, using each digit exactly once, so that the absolute value of the difference of the two numbers is as small as possible.
4. ### Calculus Bonus

Form two four-digit numbers from the digits 2, 3, 4, 5, 6, 7, 8, and 9, using each digit exactly once, so that the absolute value of the difference of the two numbers is as small as possible. I don't know where to start, any help would …
5. ### math

how many possible 3 digit numbers are there that have a middle zero?
6. ### algebra 2

how many 7-digit phone numbers are possible if the first digit must be non-zero?
7. ### Records Management

I am having a hard time understanding how to arrange these numbers and I have to turn the assignment in tomorrow. Any help would be appreciated. 1. arrange the numbers in terminal digit order. 2. arrange the numbers in middle digit …
8. ### Math. Explain

From the digits 1, 2, 3, and 4, how many positive integers are less than 100,000?
9. ### Algebra 1

How many two-digit numbers have a tens digit that is greater than the units digit?
10. ### math

How many ODD three digit numbers is it possible to make using the numbers 4, 5 and 7 if you are allowed to use each of the numbers more than once in a particular three digit number?

More Similar Questions