QUESTION 1 Ilustrate the number 20 with rectangular anrays. Illustrate all recta

Question

QUESTION 1 Ilustrate the number 20 with rectangular anrays. Illustrate all rectangular amays that are possible. How many rectangles can be formed? QUESTION 2 How many different factors does 20 have? QUESTION 3 List all of the positive divisors of 20. Separate numbers with commas Paragraph v Arial v 3(12pt) v Mashups Path p QUESTION 4 Which of folowing are comect phrasing using the terms: factors, dhides, or muitiples, when working with the number 18 Choose all that apply. O 18 divides 3 O 18 is a multiple of 3 O 6 is a factor of 18 6 divides 3 18 is a multiple of 2 2 divides 18

Explanation / Answer

14.

1 is neither prime nor composite,

Reason, since prime number should have two factors, 1 and itself

composite number should have more than two factors.

15.

19 is prime number

since it has only two factors = 1 and 19

16.

57 is composite number

since it has more than two factors = 1, 3, 19, 57

17.

2456 is composite number,

all even numbers are composite number except 2, since every even number is divided by 2

18.

321 is a composite number,

since it's a factor of 3

19.

prime factorization of 840:

840/2 = 420

420/2 = 210

210/2 = 105

105/3 = 35

35/5 = 7

7/7 = 1

So, = 2^3.3.5.7

20.

GCF of 54 and 36

54 = 2*3*3*3

36 = 2*2*3*3

GCF = 2^1*3^2 = 18

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