Sarin participates in school anniversary event part 19 (Math Question)

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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, Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills to deal with Math Modeling, Math Problem Solving and 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 Algebra and Problem Sum.

Read the posting on Sarin participates in school anniversary event part 1 for story on school anniversary.

Read the posting on Sarin learns Symbol, Algebra and Equation in school (Math Concept) to understand the concept of Algebra.

Challenge yourself with the question before look out for the given solution‼

Upper primary school mathematics question UPQ380

Sarin is given120k armbands for his team to use during the anniversary event. They are shared among 4 boys and 8 girls. Each boy received 4 arm bands.

(b) If k = 2, how many armbands did each girl receive?

Solution:

There are total 120k of armbands

The 4 boys has 4 armbands each

The model

Total armbands given to the 8 girls = 120k – 4 × 4 = 120k – 16 = 8 (15k – 2)

The number of armbands each girl had = 8 (15k – 2) ÷ 8 = (15k – 2)

If k =2

The number of armbands each girl had = 15 × 2 – 2 = 28