hannahfinnegan77 hannahfinnegan77

07-12-2020
Mathematics

contestada

Andrea's locker combination only contains composite numbers. Which of the following could be her locker combination?

a. 42, 60, 15

b. 17, 45, 90

c. 75, 34, 13

d. 21, 31, 51

Respuesta :

jimrgrant1 jimrgrant1

07-12-2020

Answer:

(a)

Step-by-step explanation:

Prime numbers only have 2 factors, 1 and the number itself.

Numbers which have other factors are composite.

(a) are all composite numbers

(b) 17 is a prime number

(c) 13 is a prime number

(d) 31 is a prime number

The locker combination must therefore be (a)

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