5.the following are composite numbers except _____?
a.11
b.25
c.35
d.55
6.which of the following is a composite number?
a.11
b.19
c.29
d.69
7.the greatest common factor of 40and 48 is _____
a.4
b.5
c.8
d.10
8.in 90 and 60,the greatest common factor is _____
a.15
b.20
c.25
d.30
9.the first two common multiples of 10 and 25 are _____
a.50,60
b.50,70
c.50,80
d.50,100
10.the least common multiple of 24 and 32 is _____
a.66
b.76
c.86
d.96
11._____ is the least common multiple of 25 and 45 ___
a.205
b.215
c.225
d.235
12.which of the following numbers has only two factors, 1 and itself?
a.29
b.49
c.69
d.99
13.all are composite numbers except ____.
a.19
b.35
c.45
d.69
14.what is the missing number in the series 20,40,60,___,100?
a.70
b.75
c .80
d.90
15.which of the following is not a multiple of 10?
a.75
b.80
c.100
d.200​