Zhong Shu Hao
Asked 9 years ago

SG chevron_right chevron_right

Logic Training 😝 have fun

Replies 1
Kim Soon Chin

Man 2. Man 1 saw two diff color hats so he cannot be sure abt his hat color. If Man 1 not shouting, Man 2 will know the color of hat for Man 3 is diff from his. Therefore he is certain that his hat color is red.

6 years ago

Teresa Ng
Asked 9 years ago

SG chevron_right Primary 4 chevron_right Fractions

Replies 11
Zhong Shu Hao

Initial ratio of boys:girls is 2:11. When 36 girls left, ratio became 1:4. Find how many kids there were initially.

6 years ago
Teresa Ng

still dont understand

6 years ago
Teresa Ng

this is a P4 fraction question cant be using ratio method.

6 years ago
Teresa Ng

sori i still dont understand and i need to explain to my P4 girl....

6 years ago
Zhong Shu Hao

Boys is 2/11 of girls means for every 2 boys present, there are 11 girls present.

6 years ago
Yeo See Yeong

6 years ago
Soo Vei Li

6 years ago
Soo Vei Li

The idea is to understand that because the number of boys remains the same, the 2 units in the 'before' situation will form 1 unit in the 'after' situation. The other questions that you have posted are similar to this.

6 years ago
Chrissy Ong

6 years ago
Tan Weiqiang

Did up a video to explain how it's done. Hope it helps! http://youtu.be/j056leAIYx4?hd=1

6 years ago
Teresa Ng

thks all

6 years ago

Teresa Ng
Asked 9 years ago

SG chevron_right Primary 4 chevron_right Fractions

Replies 4
Zhong Shu Hao

Ratio of Tom's money to Judy's money is 2:9. When Judy has spent $144, the ratio became 1:3.

6 years ago
Teresa Ng

this is a P4 fraction question cant be using ratio method...

6 years ago
Zhong Shu Hao

Not ratio lah... Im only rephrasing the Q. You are supposed to know how to read ratio from fractions, thus draw the model.

6 years ago
Yeo See Yeong

All three questions are quite similar.

6 years ago

Teresa Ng
Asked 9 years ago

SG chevron_right Primary 4 chevron_right Fractions

Replies 3
Zhong Shu Hao

Ratio of local stamps to foreign stamps is 6:11. When 72 foreign stamps were sold, the ratio became 3:1.

6 years ago
Soo Vei Li

6 years ago
Teresa Ng

thks

6 years ago

Teresa Ng
Asked 9 years ago

SG chevron_right Primary 4 chevron_right Fractions

Dear all, sorry to trouble u all again... I have problem understanding the following maths question...

Replies 1
Caleb Tey

6 years ago

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