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, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn to deal 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 Ratio and Problem Sum.
You should read posting on Sarin learns concept of ratio in school to understand mathematics concept of Ratio.
Challenge yourself with the question before look for the given solution‼!
Upper primary school mathematics question UPQ422
At the Causeway, there are an equal number of cars and motorcycles queueing at Woodlands custom check point. The total number of wheels of these cars and motorcycles is 1500. How many vehicles are there in the queue?
Using Grouping method
A car has 4 wheels and a motorcycles has 2 wheels
Since there is same number of cars and motorcycle
By grouping a car and a motorcycle as a set
The number of wheels in a set = 4 + 2 = 6
Total number of sets = 1500 ÷ 6 = 250
The total number of vehicles in the queue = 2 × 250 = 500
Approach the question using ratio
The number of cars and the number of motorcycles are equal
Cars : Motocycles = 1 : 1
Since a car has 4 wheels and a a motorcycle has 2 wheels
In term of ratio based on number of wheels
Car wheels : Motorcycle wheels = 4 : 2 = 2 : 1
3 units = 1500
1 unit = 500
The number of wheels for motorcycles = 500
The number of motorcycles = 500 ÷ 2 = 250
The total number of vehicle in the queue = 2 × 250 = 500