Everyday Life Maths Question

Here is the pricing for economy rice from a typical coffee shop.
The question is:

Question

Based on the pricing (first three from left to right), how much does the rice cost ? Also, based on all the four pricings, which one is considered not fair?

You see, maths question is everywhere. Just keep your eyes open.

PSLE 2009 Question

Question

From ChannelNewsAsia: Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. The ratio of Jim's sweets to chocolates became 1:7 and the ratio of Ken's sweets to chocolates became 1:4. How many sweets did Ken buy?

Answer