SG Talk

DA questions 

Note that this is a 20 questions in 30 minutes test 
A rectangular piece of paper measures 40cm by 5cm and some genius want to cut out as many small rectangles measure 5cm by 2cm as possible. What is the maximum number of small rectangles that can be cut?
[A]  12
[B]  16
[C]  20
[D]  14
[E]  18

Suppose the numbers X and Y are described by simultaneous equations:
4 * X + 7 * Y = 19
7 * X - 3 * Y = 18

What is the value of Y/X?
[1] 0.3
[2] 0.667
[3] 0.333
[4] 1
[5] 1.5

A CD shop adopted the following strategies to boost sales:
1. Distributed one time coupon worth $5 when customer buy CD
2. CD will be sold at D% discount from list price
3. Further, if buy more than 10 CDs, subsequence CD got extra $1 discount, means 11th, 12th, 13th, etc.
One fine afternoon, a man purchased 15 CDs, each have list price of X dollars and he also use the $5 coupon as well. How much has he spend?
[A] X * 15 * (1 - 2 * D / 100)
[B] X * (1 - D / 100) * 10
[C] X * 15 * (1 - D / 100) - 10
[D] 2 * X * (1 - D / 100) - 5)
[E] None of the above
* Option D has a extra closing blanket ")" is really from the test itself...

no one
smart enough

Yawnn.....nothing better to do meh...

aiya, so simper. asking forumers to help or testing them?

1.

max possible: (40*5)|(2*5) = 20

possibility #1: 40|5 * 5|2 = 16
possibility #2: 40|2 * 5|5 = 20

so 20