-1
Composite. 222111 has 9 as one of its factors [sum of its digits adds up to 9]. A Prime Number has only two factors : 1 and itself. Since this has at least one additional factor, it is composite.
The answers are: -5*-3 = 15, -8*7 = -56 and -4*-12 = 48
1
20
25
The factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30. The factors 1+3+5+10=19, 1+2+6+10=19, 1+3+15=19, and 3+6+10= 19.
speed = distance/time = 1/160 = .00625 miles per second there are 3600 seconds in one hour, so this is .00625 x 3600 = 22.5 miles per hour
The factors of 35 are: 1x35 and 7x5 add the factors 1+35+7+5= 48
212 + 1
1/4 and 1/4 adds up to give a half. 1/8 and a 1/8 and another 1/8 and another 1/8 adds up to a half .
84
-1
6*1
-6 and -1.
98764+1
1 and 4