Q: How many numbers contain a 3?

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19 whole numbers, and infinitely many fractions and decimals

Since the numbers begin with 123, they all contain a 3. As a result, they all "contain 3 or 7". So the remaining 4 digits can be any digits and this gives 104 = 10,000 such numbers.

234

252

-5

Related questions

3

19 whole numbers, and infinitely many fractions and decimals

Since the numbers begin with 123, they all contain a 3. As a result, they all "contain 3 or 7". So the remaining 4 digits can be any digits and this gives 104 = 10,000 such numbers.

252

234

-5

18

252

There are 156 such numbers.

There are 195 such numbers.

13

Whole numbers are 0 , 1 , 2 , 3 etc.. (dont contain negative) Integers are -2 , -1 , 0 , 1 , 2 , 3, ie they CONTAIN whole numbers