Q: How many prime numbers 801 to 900?

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The numbers 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991 and 997 are prime.

The numbers 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883 and 887 are prime.

To find the HCF you first have to write the numbers as their prime factors: 36 = 2x2x3x3 75 = 3x5x5 The next step is to identify any common prime factors. In this case both numbers have 3 as a prime factor. Thus the HCF is 3. To find the LCM you need to multiply the numbers together and divide by the HCF. 36x75/3 = 900 Thus the LCM of 36 and 75 is 900.

Keep dividing the number 900 with prime numbers until you can't get any smaller. All the numbers that you've divided by will make up the prime factorsThe best way to lay your working out is through a prime factor tree diagram but since I can't do that here, I'll just demonstrate it the plain old boring way:900 / 3 = 300300 / 3 = 100100 / 2 = 5050 / 2 = 2525 / 5 = 5All the numbers in bold are what make up the 900 as those were the prime factors I divided with.Remember that you must also include the last number as well which I've just underlined because that is also a prime number.Now that we have all our prime factors, we put them in order:2 x 2 x 3 x 3 x 5 x 5.And that's it. Alternatively, you could simplify it by bringing in the same numbers together and writing it like this:22 x 32 x 52Remember, these prime factors of yours should multiply back to get you 900. If it doesn't, then you've gone wrong somewhere. This is a good way to check your answer whenever you are doing a Prime Factor question.Hope that helps.Jamz159.

901

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The prime factors of 900 are 2, 3 and 5

900 = 100% Divide by 100 to get 1% 900 ÷ 100 = 9 9 = 1% Multiply by 89 to get 80% 9 times 89 = 801 801 = 81% of 900

887 and 13

No, it is composite. All whole numbers ending in zero or five are composite.

There are 899 numbers that are less than 900

The numbers 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991 and 997 are prime.

900 is not prime. 900 = 2 * 2 * 3 * 3 * 5 * 5

The numbers 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883 and 887 are prime.

Those four numbers are all whole numbers.

The prime factors of 900 are 2x2x3x3x5x5.

There were two: The 9th century BCE (commonly thought of as BC) was 900-801 BCE. The 9th century CE (commonly thought of as AD) was 801-900 AD. Now, many will tell you that the century begins with the zero year (100, 1000, etc.). Not so. Consider that when you count to ten, you start with one, not zero (as in 1-2-3-4-5-6-7-8-9-10); the same is true with calendars.

900 numbers