Question

1 tuliskanlah bilangan prima dari:
a 21 sampai 40
b 56 sampai 1oo
c 30 sampai 80

2 tentukanlah faktor prima dan faktorisasi dari:
a 78
b 42
c120

3 tentukanlah fpb dan kpk dari:
a 25 dan 70
b 20 dan 100
c 36,42dan 70
d 18,30 dan 36

Answer 1

1.
a. 23, 29,31, 37
b. 59, 61, 67, 71, 73, 79, 83, 89, 91, 97
c. 31, 37, 41, 43, 47, 53, 59, 61, 67, 71,73, 79

Answer 2

1.
a.
23, 29, 31, dan 37.
b.
59, 61, 67, 71, 73, 79, 83, 89, dan 97.
c.
31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, dan 79.

2.
a.
78 = 2, 3, dan 13.
b.
42 = 2, 3, dan 7.
c.
120 = 2, 3, dan 5.

3.
a.
25 = 5^2
70 = 2 x 5 x 7
FPB = 5
KPK = 2 x 5^2 x 7 = 350

b.
20 = 2^2 x 5
100 = 2^2 x 5^2
FPB = 2^2 x 5 = 20
KPK = 2^2 x 5^2 = 100

c.
36 = 2^2 x 3^2
42 = 2 x 3 x 7
70 = 2 x 5 x 7
FPB = 2
KPK = 2^2 x 3^2 x 5 x 7 = 1.260