The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills of dealing with the Math Modeling, the Math problem solving and the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Fraction, Percentage, Ratio and Problem Solving.

You can read the posting on **Sarin and his coin bank** for the story of coin bank.

Read the posting on **Sarin learns concept of ratio in school** to understand Ratio.

Read also the posting on **Sarin learns the concept of Fraction (mathematics concept)** to understand Fraction.

Read the posting on **Sarin learns Average Number, Percentage and and Charting in school (Math Concept)**** **to understand the concept of Percentage**.**

*Challenge yourself with the Question before look out for the given solution‼!*

**Upper primary school mathematics question UPQ484**

At first, 25% of Sarin’s money in his coin bank was the same as 1/3 of Hairu’s money in his coin bank. Father gave Hairu another $80 while Sarin spent $150 on some books. In the end, Hairu had 2 ½ times as much money in his coin bank as Sarin had in his coin bank.

(a) How much money did Sarin have in his coin bank at first?

(b) How much money did Hairu have in his coin bank in the end?

…Click to know the solution…

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