OK, so the test is in 5 days, and I have some PS questions.
maybe someone can help me… (I have the answers but I don't get them… so there is either a mistake in the answers or in my head…)
1. John has 7 bananas and 3 kiwis. He needs to divide the 10 in two parcels, so there is an equal total number of fruit in either parcel and so that there is at least one kiwi in each parcel.
a) 21
b) 35
c)60
d) 105
e) 120
2. From the word ZEBRA how many different letter combinations can be arranged by using the foregoing letters?
a) 20
b) 60
c)100
d) 120
e) 150
3. Five coins are tossed one after the other. what is the probability that the first three are heads?
a) 1/16
b) 5/16
c) 1/2
d) 2/3
e) 11/16
4. a monkey is at the bottom of a 30 foot well. each day he jumps up three and slips back two. at that rate, in how many days will the monkey reach the top of the well?
a) 27
b) 28
c) 29
d) 30
e) 31
5. a cook went to a merket to buy some eggs and paid 12$ for them. but since the eggs were quite small he talked the seller into adding 2 more eggs, free of charge. As the 2 eggs were added, the price per dozen went down by a dollar. How many eggs did the cook bring home from the market?
a) 12
b)16
c)15
d)18
e) 8
6. for the equation |||x|-3|-x|=3 find all the solutions
a) [-3,0]
b) no solutions
c) [-3,0]U[3, +inf]
d) [-3,3]
e) [3,+inf]
let's see what any of you has to say…
thanks,
Dalit
