Sarin’s father crossing the Causeway part 13 (Math Question)

Standard

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.

Read the posting on Sarin’s father visits his friend in JB town to know about JB town as well as read the posting on Sarin’s father crossing the Causeway to know about the Johor-Singapore Causeway.

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?

UPQ422-1

Solution:

            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

Alternative solution:

            Approach the question using ratio

            The number of cars and the number of motorcycles are equal

            In ratio,

                        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

UPQ422-2

                        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

More Questions on Ratio. Click here….

More Questions on Problem Sum. Click here….

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s