Tap in & Tap out

For those who take bus frequently, you will probably know there is a promotion by SBS currently.


Bus concession users like us can earn e-tokens when taking any bus and use them to bid for items such as iPod nano or mobile phone vouchers. The main criteria is to tap out when exiting to earn those e-tokens.

During the last auction, 30 May, i noticed something interesting.....


This person has won 3 of the auction items and used a total of 1492 e-tokens to bid.

Now here is the interesting part:

• Since this promotion only starts from 11 May, she probably only has 20 days to accumulate 1492 or rather, 1500 e-tokens after rounding off.
  
  
• Since each bus ride will give 2 e-tokens while most feeder buses only give 1 e-tokens, she needed to make 750 bus trips to earn 1500 e-tokens, assuming she only take normal trunk services.
  
  
• On average, she needed to make about 38 trips per day.
  
  
• How on earth is a person going to take 38 bus trips per day? Or rather 19 trips to her work place, and 19 trips back home if she is working or going to school.
  
  
• Because it is impossible, there is only one possible way how she earn 76 e-tokens per day:
  
  She will board a bus, tap in, and exit at the next bus-stop, tap out and wait for another bus to come and board again. This will repeat 38 times.

Conclusion: She is very free. Me too.