Actually I don't find the questions easy either.
For the first one I have an answer, I'm still working on the second one.
The difficulty with the first one is that the correct answer is not listed - in my opinion.
Note that it says that:
1. Pencil < Pen < Eraser from the price point of view
2. Money < 5 * Pen.
Note that it doesn't say:
1. How much Money really is.
If:
Pencil = 4
Pen = 5
Eraser = 6 and
Money = 1
then all the conditions of the problem are met.
1. 4 < 5 < 6
2. Money < 5 * 5 = 25
So Peter doesn't have enough money to do anything so we could say that answer b is correct.
But if Money = 5 he has enough money to buy a Pen so we could say that a is correct.
If Money = 20 he has enough money to buy 5 Pencils - c and e and a.
If Money = 8 he can buy 2 Pencils but only one Pen so we could chose d and a.
If Money = 12 we could choose e and a.
The correct answer in my opinion is that we can't really say what Peter can/can't do with his money. This question is stupid.
