20% of the people in a school hall are teachers and the rest are pupils. 75% of the pupils are boys and there are 72 more boys than girls. How many boys must leave the hall so that 20% of the people in the hall are boys ?
Jul 31, 2024
P6 Math: Red and White Roses Ratio
There are 60 roses in a box. 30% of the roses are red roses while the rest are white roses. How many of red roses must be added so that the number of red roses will become 40%?
Jul 27, 2024
P6 Math : Painting Job
It is quite common question asked in the Speed chapter. A bit twist, rather than DISTANCE, now it is asking JOB.
Example:
John, Mark, and Shaun were hired to paint a house.
Together, they can finish the job in one hour.
John and Mark can finish the job in 1 hour 12 minutes.
Mark and Shaun can finish the job in 1 hour 30 minutes.
How long in minutes will Mark take to finish the same job by himself ?
Jun 21, 2024
May 22, 2024
Ratio: Loh Sneakers
Mr. Loh had some sneakers in his shop. 3/8 of them were red, 3/10 of the remainder were black, and the rest were white.
The table above shows the amount he earned per pair of shoes. The number of red shoes sold to the number of black shoes sold to the number of white shoes sold was 1 : 2 : 4. In total, he sold one quarter of the shoes and earned $1,080. How many pairs of white shoes did have at first ?
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