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Q: How many odd two digit numbers less than seventy are there?

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18 numbers are there

40. Excluding numbers starting with 0.

There are 278 5-digit numbers less than 20,000 that are divisible by both four and nine.

There are five such numbers.

There are 21 two-digit prime numbers.

With a total of 90,000 five digit numbers, we can conclude that there is 45,000 EVEN five digit numbers.

None. 3 digit numbers are not divisible by 19 digit numbers.

There are 900 three-digit numbers, ranging from 100 to 999.

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

The answer will depend on how many digits there are in each of the 30 numbers. If the 30 numbers are all 6-digit numbers then the answer is NONE! If the 30 numbers are the first 30 counting numbers then there are 126 combinations of five 1-digit numbers, 1764 combinations of three 1-digit numbers and one 2-digit number, and 1710 combinations of one 1-digit number and two 2-digit numbers. That makes a total of 3600 5-digit combinations.

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