MCQ Answers to the Science Paper Handed out today

Dear all,

Found below are the answers to the MCQ section.
My apologies for being able to make the print larger.

S20 Supplement

Dear all,

Try this question.

Mr Lam has two photocopy machines in his office.

Machine A prints 14 pages more than Machine B in every minute.

Machine A and Machine B together print a total of 552 pages after 3 minutes. How many pages does Machine B print in every minute?

Have fun! :)
Mrs R

S19 Supplement

Dear all,

Try this question.

In a game, Ahmad lost 15 marbles to Benjamin.

Benjamin lost 9 marbles to Charles.

Charles lost 13 marbles to Ahmad.

Each of them has 30 marbles at the end of the game session.

Find the total number of marbles Ahmad and Benjamin had at first. 

Have fun! :)
Mrs R

S18 Supplement

Dear all,

Try this question.

A baker had some eggs. He used 1/7 of them on Monday and 1/11 of the rest on Tuesday. He bought another 153 eggs and then had as many eggs as he had at first. How many eggs did he have at first?

Have fun! :)
Mrs R

S17 Supplement

Dear all,

Try this question.

Ahmad and May saved $800 altogether. 1/4 of Ahmad's savings was $65 more than 1/5 of May's savings. How much more money than May did Ahmad save?

Have fun! :)
Mrs R

Load your own Challenge Questions

Dear all,

If you have a question you would like to share with your friends.
Please do so here.

Have fun! :)
Mrs R

Vita Answer

3a) Milk bottle X
3b) Water is a better conductor of heat than air.

4a) Point A
4b) 20min - 5min = 15 min
4c) A passenger/ Jane had just sat on the seat (0.5m), heat is gained by the seat from his/her body (0.5m) causing the seat to gain more heat and the temperature rises at point C. (1m)

5a) Possible ans: A and D/ A and C/ B and D/ C and D
5b) D , B

6a) (The question is about Carly so the answer should be specific to Carly) 
      Carly was losing heat quickly to the environment.
6b) The air in the room gained more heat (1m) as heat from more heat was loss by the increased number of people in the room.

7a) Styrofoam
7b) Styrofoam is a poor conductor of heat (1m) so the heat loss from the noodles to the surrounding air was reduced. (1m)
7c) There is an increased exposed surface area (0.5m) to allow more heat loss (0.5m) from the noodles to the surrounding air. 
7d) Noodles: heat loss; Chopsticks: heat gain 

Hope this help :)
Mrs R