Iluvmygals\" post_id=\"1910717\" time=\"1558045742\" user_id=\"26453:

twinningtalks\" post_id=\"1910704\" time=\"1558022549\" user_id=\"172357:

I need help on the rationale behind why the answer is (3) for the below question. If the answer is (3), the principle \"Air can be compressed\" does not apply to the balloon. So which principle explains and support the answer below. Thank you so much.

https://postimg.cc/5XHYJqPm

1. While air can be compressed in the balloon, we don't know how much it will be compressed...so it can be 320, 380 etc. So straight away choice 1 & 2 can be eliminated.
2. So left choice 3 & 4 to choose from. So since the glass ball is fixed shape and volume, the answer is 3.

Thank you, iluvmygals

realtalk:

Hello! Section B is really tough. I am considering maths heuristic section B class or CCE for the holiday break. I am seriously considering either one but if someone could give me feedback on how the classes helped their kids, I’d appreciate it. Thanks.

I feel you, realtalk. My P4 daughter had the same problem last year. Math was kind of traumatizing for her. She somehow had the idea that if you’re smart, you can do math and, if you’re not smart, you cannot. Her confidence was greatly affected as she was getting failing marks on exams.