Enrichment: Daily Math Problem 4/17/20

4/17/2020

9 Comments

Here is today's daily enrichment math problem:

9 Comments

vitus Aku link

4/17/2020 09:36:57 am

The prime number is 5.

Mr. Bowen

4/17/2020 12:52:30 pm

Five is prime, but you are looking for a 3-digit prime number.

vitus Aku link

4/17/2020 01:29:58 pm

okay i think it will be 555

Mr. Bowen

4/17/2020 04:24:31 pm

What are the factors of 555? A prime number only has 2 factors.

Haylee

4/17/2020 01:32:01 pm

555 is what I found

Mr. Bowen

4/17/2020 04:23:57 pm

Remember, a prime number has exactly 2 factors, 1 and itself. Does 555 have any other factors?

vitus Aku link

4/18/2020 10:42:31 am

Another one could be eleven maybe

Ryder link

4/20/2020 11:43:24 am

what about 591

Mr. Bowen

4/20/2020 12:15:21 pm

You can check if a number is divisible by 3 by finding the sum of the digits (5 + 9 + 1 = 15) and then seeing if that sum is divisible by 3. Because 15 is divisible by 3, the entire number also has 3 as a factor. This means that 591 is composite.

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Enrichment: Daily Math Problem 4/17/20

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