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Q: How many numbers greater than 25 but less than 50 have 4 as one of their digits?

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There are 3^6 - 1 = 728 of the.

All of them. We normally count in decimal numbers and therefore all digits in decimal numbers must be less than ten.

There are 5 numbers of 1 digit, 25 numbers of 2 digits, and 75 numbers of 3 digits. This makes 105 numbers in all.

I'm assuming the question should read n greater than 10 and less than 100 and there are 8 numbers that satisfy this,1223344556677889So the answer is dhttp://www.webanswers.com/share-question.cfm?q=how-many-integers-n-greater-than-and-less-than-100-are-there-such-that-if-the-digits-of-n-are-the-is-1379ff| http://www.webanswers.com/answer/1566078/education/how-many-integers-n-greater-than-and-less-than-100-are-there-such-that-if-the-digits-of-n-are-the-is-1379ff| http://www.webanswers.com/report-abuse.cfm?q=how-many-integers-n-greater-than-and-less-than-100-are-there-such-that-if-the-digits-of-n-are-the-is-1379ff&p=1566078

An infinite number of numbers. Any number greater than 3999.5 and less than 4000.5 rounded to an integer (there are differing conventions for dealing with rounding 0.5). There is an infinity of such numbers; also, any number greater than 3995 and less than 4005 rounded to 3 sig digits; or, any number greater than 3950 and less than 4050, rounded of to 2 sig digits; or any number greater than 3500 and less than 4500, rounded off to 1 significant digit. , any

12 numbers.

Twelve numbers exactly are greater than 76 and less than 89.

The prime numbers that are greater than 80 and less than 100 are 83, 89, and 97.

10

3 composite numbers, 21, 22, and 24, are greater than 20 but less than 25.

There are 15 composite numbers greater than 50 but less than 70

Infinitely many.

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