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Earn +20 ptsQ: Identify each number as a prime or composite number 13 33 45 19?
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How can you use an array of counters to identify whether a number of counters is prime or composite?
If you can arrange the counters in the shape of a rectangle with at least two in each row and each column then the number is composite. The numbers of row and the numbers of columns are factors of the given number. If the only rectangle you can make is the "degenerate" one, with only one row or only one column, then the number is prime.
Is 43 and 32 composite or prime?
43 is prime. 32 is composite.
Is 4 and 31 prime or composite?
4 is composite, 31 is prime.
What is the sum ratio of the number of one digit prime numbers and the number of one digit composite numbers?
There are four of each.
Which is a prime number 33 43 63?
33 has the factors ,3, & '11' ; it is composite 43 has no factors ; it is a prime number 63 has the factors 3,7,9,21 ; it is composite.
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