Real World Maths Exam

I copied this off Tzy Shih’s blog. He didn’t provide the answers, so I did.



GANG NAME_________________________

1) Jose has 2 ounces of cocaine. If he sells an 8 ball to Antonio for $320 and 2 grams to Juan for $85 per gram, what is the street value of the rest of his hold?

2) Rufus pimps 3 hos. If the price is $85 per trick, how many tricks per day must each ho turn to support Rufus’ $800 per day crack habit?

3) Jerome wants to cut the pound of cocaine he bought for $40,000 to make a 20% profit. How many ounces will he need?

4) Willie gets $200 for a stolen BMW, $150 for stealing a Corvette, and $100 for a 4×4. If he steals 1 BMW, 2 Corvettes, and 3 4×4′s, how many more Corvettes must he steal to have $900?

5) Raoul got 6 years for murder, he also got $10,000 for the hit. If his common-law wife spends $100 per month, how much money will be left when he gets out?

**Extra credit question: How much more time will he get for killing the ho that spent his money??**

6) If an average can of spray paint covers 22 square feet and the average letter is 3 square feet, how many letters can be sprayed with 3 eight-ounce cans of spray paint?

7) Hector knocked up 3 girls in the gang. There are 27 girls in his gang. What is the exact percentage of girls Hector knocked up?

8) Bernie is a lookout for the gang. Bernie has a boa constrictor that eats 3 small rats per week at a cost of $5 per rat. If Bernie makes $700 a week as a lookout, how many weeks can he feed the boa with one week’s salary?

9) Billy steals Joe’s skateboard. As Billy skates away at 35 mph, Joe loads his 357 Magnum. If it takes Joe 20 seconds to load his Magnum, how far away will Billy be when he gets whacked?


And the answers:

1. $2302 if he sells at $45 per gram as he did when he sold the 8 ball at $320.

2. More than 3 tricks per hoe. Or exactly 3.137

3. Considering the average purity of street cocaine to be around 25%, and the price to be around $100 per gram, he would need about 4.23 ounces of pure cocaine to make $48,000.

4. Just one more.

5. He will be left with $2800. Bonus question: he will probably get more than 6 years for a repeated offence.

6. 22 letters.

7. 11.11%

8. 46.66 weeks.

9. 0.194 miles or 312 meters away.


No wonder drugs are so profitable… Continue reading

Life is a Rollercoaster

Past 2 days have been like a rollercoaster ride. First our class on Tuesday was canceled until further notice and we got to know about that on Monday night. Today we came to work and it was announced that we will start our classes again on the 15th of August. I was thinking of flying over to Sabah for a short sightseeing trip since I’ve not been there yet. Then suddenly at 6pm today, we’re told that classes will resume tomorrow. So all plans canceled and it will be back to studying tomorrow.

Rapid prototyping. That’s what I love about PICs. It took 4 hours including dinner to do this. This 16F88 with internal ADC is going to become a battery monitor for 2 battery packs in a giant scale RC plane.

And this shows how good the battery life of an iPhone is. Alright, maybe the test was a bit biased. But still, impressive figures.

Time to sleep. Continue reading

Back from Kuching

Sometimes I wish I have long holidays. But then I wonder what I’ll do everyday if I had such a long leave. If I don’t travel and just stay at home, I might just rot and go to waste. In fact, I realized that just a short holiday from time to time would suffice. The trip back home was good. Hence now I’m back to studying.

Home-made tepanyaki. From top: quail, squid, salmon and lamb.

Please send diet tips for cats to my email. Better get her slimmed down before she dies of heart attack or artery clogging.

And here’s a hilarious parody of the Dark Knight. There are many more but I think this is one of my favourite:

Continue reading

Qantas 747 Lands with Hole in Fuselage

Qantas flight QF30 made an emergency landing in Manila after the Boeing 747 Jumbo Jet suffered a mid-air cabin decompression caused by a gaping hole on the right lower fuselage. Passengers described hearing an explosion before the oxygen masks were deployed. There was “paper” and “bits of wood and debris” flying around in the aircraft caused by the “swirling” wind. The paper reported that the plane “plunged 20,000 feet” following the decompression.

Gaping hole on the 747′s fuselage. Photo courtesy: Getty images via

Currently there are a few speculations on how this could happen. Because investigations have not been finalized yet, these are merely theories:

  1. Corrosion – Corrosion is no doubt the number 1 enemy of an airplane. The structure of a plane is made up of mainly aluminum alloys. These are susceptible to corrosion. Routine inspections and checks should be able to reveal areas suffering from corrosion and maintenance action taken to repair them before a structure failure occurs. Judging from the picture below, we can clearly see that a few stringers have broke and parts of the skin has been blown off. For a plane that has been designed with redundant load paths and a safety margin for its structural strength, under proper maintenance with no corrosion and normal operating conditions, this would never happen.

    Some of the broken stringers are still attached to the skin of the aircraft (above red object).

  2. Explosion in the cargo area – If the plane’s structure is under good condition, cabin pressurization will not cause the fuselage to rupture. A greater force is required, and that could come in the form of a bomb of an aerosol can exploding during the flight. A bomb is not very likely as it would probably pack enough punch to blow the whole plane into a million pieces. An aerosol can that expanded during mid-air due to the reduced air pressure might cause it to explode and the force might rupture the skin. But a small aerosol can might not have enough explosive power to rip the skin apart since the aerosol can is probably packed inside a baggage and in the cargo area there are sidewalls that will stop the small explosion of the aerosol can before it reaches the aluminum skin.

    The cargo hold of a cargo 747. The passenger 747′s cargo hold is similar in construction, with white sidewall panels (fiberglass) covering the structure and insulation blanket behind it.

Other than the above reasons, I cannot think of any other causes for this until I take a closer look at a real 747 when I get back to work. There may be pipelines running though the area that may have burst, or some other failure that may have indirectly caused the fuselage to rupture (e.g. cabin differential pressure too high?).

The plane plunging 20,000 feet is not caused by the decompression or the hole in the fuselage. It was probably a safety maneuver during a cabin decompression. When the plane is flying at 29,000 feet (as reported), air pressure is very low and humans cannot survive because of the lack of oxygen, hence the deployment of the oxygen masks. The oxygen masks will not last forever so the common sense thing to do is to bring the aircraft down to a lower altitude as soon as possible where oxygen is sufficient for humans.

This post will be updated when more information becomes available.

Update: 2nd September 2008: Oxygen Bottle Blamed for Hole in Qantas 747. Continue reading

Back In Kuching

It’s funny how the more you travel, the more you can’t stand taking flights. The time it takes to fly from KL to Kuching seems longer than the last time and the time before that. But anyways, it’s good to be back, to take a break before my classes continue well into the end of the year.

Lazing around with nothing better to do.

Giving the tongue.

Blending in.

This cat is currently having a flu. You can occasionally hear it sniffing and sneezing.

I’ve watched the Dark Knight yesterday and it is a great movie. 2 hours and a half passed without a dull moment. Highly recommended! Continue reading