Math SAT Problems Help!

<p>At first stop after a school bus left the school, 4 children got off the bus. One-quarter of the remaining children got off at the second stop and 10 children got off at the third stop. if there were still 14 children on the bus after third stop.how many children were on the bus as it left the school?
A)28
B)32
C)34
D)35
E)36</p>

<p>THE answer is E</p>

<p>-The distance danielle walks is directly proportional to the length of the time it walks. if she walks a distance of 1and1/3 miles and in 20 minutes, how many miles will she walk in an hour?
i get it 1 but its 4 :/</p>

<p>-the toll for trucks to cross a certain bridge is a total of 2 dollars for the first two axles plus 2 dollars for each additional axle.which of the following functions gives the toll T(n) for a truck with n axles?
A)T(N)=2N-2
B)T(N)=2N-1
C)T(N)=2N
D)T(N)=2N+1
E)T(N)=2N+2</p>

<p>Charissa bought several packages of pencils from the collage bookstore. if each package contained either 5 or 12 pencils, which of the following could not be the total numbers of the pencils that charissa bought?
A)32
B)33
c)34
d)36
e)37</p>

<p>Alternate solution for problem 4:</p>

<p>Suppose she buys k 12-packs of pencils. I will list out the possible # of pencils for each k:
k = 0: 0, 5, 10, 15, 20, …
k = 1: 12, 17, 22, 27, 32, …
k = 2: 24, 29, 34, …
k = 3: 36 (we need not consider 41)</p>

<p>Glancing at the answer choices, it becomes obvious that 33 was not listed here, if you look at the units digit.</p>

<p>No need to plug and chug the first problem. Use straight math. </p>

<p>[(14+10) x 4/3 ] + 4 = 36</p>