The blog postings are about the Singapore Math. The readers can learn from the postings on Solving Singapore Primary School Mathematics. The blog presenting the Math Concept, Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills of dealing with Math Question Solving, Math Modeling and Problem Sums 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, Number and Problem Sum.

To read the posting on **Hairu and the numbers **to understand the concept of number.

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

Read also the posting on **Sarin learns concept of Fraction in school **to understand the concept of Fraction.

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

**Upper primary school mathematics question UPQ367**

The average of 3 numbers is 45. The first number is 2/3 of the second number and it is 26 more than the third number. Find the second number.

Solution:

The 1^{st} number is 2/3 fraction of 2^{nd} number

Add 26 to the 3^{rd} number will equal to the 1^{st} number

Draw the math model

Per the model

Since 1^{st} number = value of 2 units = 3^{rd} number + 26

We have

7 units = 135 + 26 = 161

1 unit = 23

The 2^{nd} number = 3 × 23 = 69