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1) n=7.19^3
Col A:the number of distinct positive factors of n
Col B:10
Is that 7.19^3, 7*19^3 or (7*19)^3... though i think its A in all cases...
2)At 9:am train T left train station and teo hours later train S left the same station on parallel track.If train T
averaged 60km/hr and train S averaged 75km/hr until S passed T,at what time did S pass T?
a)2pm
b)5pm
c)6pm
d)7pm
e)9pm
When train S passes train T they will have travelled the same distance... 60t = 75(t-2)... 15t = 150... t=10... 7 pm... B
3)If the perimeter of a traingle is 18,then the length of one sides cannot be
1
3
6
8
9
E
4)In a certain country a person is born every 3 seconds and a person dies every 10 seconds,Therefore the birth and
death rates account for a population growth rate of one person every
3(1/3)sec
4(2/7)sec
7sec
11(2/3)sec
13sec
1 per 3 seconds means 1/3 per second... 1 per 10 seconds means 1/10 per second... growth rate = birth rate - death rate... 1/3 -1/10... 7/30... B
5)If r and s are positive integers,each greater than 1,and
if 11(s-1)=13(r-1),what is the least possible value of r+s?
2
11
22
24
26
(s-1)/(r-1) = 13/11... obviously neither (s-1) nor (r-1) can be less than 13 or 11... in which case the ratio would reduce to lower terms and the inequality wouldn't be satisfied... so the first approximations should be 14 and 12... ie r +s =26... E
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