Hi, hope someone can help me with below question:


Tap A can fill an empty tank in 2 hours and Tap B can fill the same tank in 4 hours. How long will it take to fill the tank if both taps are turned on at the same time?

Thank you!

Hi, hope someone can enlighten me when to use singular and when to use plural for collective nouns. Thank you.


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Thank you.

Thank you for all your help!

Hi ChiefKiasu, all my p4 math questions came from past year paper. Thai age question is from Nanyang 2014 SA2 paper. I did manage to get the answer using algebra but I don’t think a p4 will use this method, also I don’t quite get the working from this paper answer sheet. Hopefully someone can help me with this question using other method like model.


Thank you.

Hi, hope someone can help solve this question, thank you!


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Thank you Alfretztay!

ACS mathlypic booklet with modifications. I didn’t know where to post but thought this is a speed question, thus I posted here. I just posted on the MO thread too.

Hi, appreciate if anyone can help to solve below question:


When Hansen visits his friend, he climbs a hill at 3km/h, then goes downhill at 6km/h and walks at 4km/h on level ground. If he takes a total of 4 hours walking there and back, how far away is his friend’s house?

Thank you very much!

Hi, appreciate if anyone can help to solve below question:


When Hansen visits his friend, he climbs a hill at 3km/h, then goes downhill at 6km/h and walks at 4km/h on level ground. If he takes a total of 4 hours walking there and back, how far away is his friend’s house?

Thank you very much!

Thank you Tabitha!