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Q: How many odd numbers are there between 1 and 10?

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for (int i = 2; i < 10; i ++) printf("%d\n", i); You did say even and odd numbers between 1 and 10. That's allnumbers between 1 and 10.

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The sum of all odd numbers, up to the odd number (2n-1) is n^2. So the sum of the first 1000 or 10^3 odd positive numbers is (10^3)^2=10^6 Now divide by 10^3 or 1000 since we have 1000 numbers so we have 10^6/10^3=1000 The mean of the first 1000 positive odd numbers is 1000 If you ask the mean of the odd numbers between, 1 and 1000, that is another problem, since there are 500 of them, the answer would be 500^2/500=500 Think of the mean of the odd numbers between 1 and 10, there are 5 of them and there sum is 25 so the mean is 25/5 or 5 **** in general, the arithmetic mean of the first n odd numbers is n^2/n or n. So that is why the number is 1000.

There are no numbers between 70 and 85 that are less than 10. Not a single one. That goes for even numbers, odd numbers, mixed numbers, and decimals.

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The odd numbers between 1 and 10 are 1, 3, 5, 7, and 9.

There are 5 odd numbers between 10 and 20: 11, 13, 15, 17, 19

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There are 10 numbers between 1 to 10 (inclusive).5 of those are odd and 5 of them are even.

There are five of them, including the number 1.

for (int i = 2; i < 10; i ++) printf("%d\n", i); You did say even and odd numbers between 1 and 10. That's allnumbers between 1 and 10.

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