KRTC Kent Ridge Education - Discussion
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Burn the first string at one end, 30 seconds.
Burn the second string at both ends, 15 seconds. -
That is the correct answer to the problem. I consulted a few heuristics books beforehand which gave quite an interesting way of looking at the problem. Sometimes instead of cracking our heads, and thinking there is an out of the box answer, maybe there is a systematic way of doing this. I have a Primary 5 child, he had great troubles when he first looked at it. But after guiding him using the below steps, he understood the problem very well.
First let us plan our way through this problem. Logically speaking one of the most direct ways we can measure 45 seconds is to burn one full string and burn another 15 seconds of string. Usually setters will not make heuristic questions too indirect. Question now is, how are we to burn another 15 seconds of string?
The most direct way of burning 15 seconds of string which many would have though of immediately is to burn half of the string. However, the limitations have been set to stop you from burning half of the string. You must be constantly aware of the limitations set by the questions and work your way through it.
Your objective is to burn 15 seconds of string. Let us look at the formula Speed = Distance X Time. The time factor is fixed at 15 seconds, we cannot fix the distance. Hence, the only way is to change the speed. How can we change the rate of burning?
The solution is, burn the second string from both ends. This way you finish burning the string in half the time, that is 15 seconds. In this way, you can easily measure 45 seconds. -
Question: Given the below materials, what is the best way to create an ice box which keeps the 3 ice cubes inside in the solid state as long as possible? Give appropriate explanations.
Materials given: Styrofoam boards, pencil shavings, iron sheets, plastic boards, water, oil. (Select 3 out of the materials here and specify the order)
Bonus: What are other good materials for insulation?
Such free-response questions merely looks out for a student's logical reasoning. There is usually no 'right' answers, but there are definitely 'wrong' answers. This type of questions have been trending in recent years at the PSLE. Good luck to all students! -
Hi, have anyone tried Kent Ridge Tuition at Toa Payoh? Any feedback? TIA
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they are franchised…do they use different tutors???
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yes of course
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anyone any feedback on the above???
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Seeking help on a physics question.
three conducting balls, X, Y and Z are suspended vertically, side by side, without touching each other, by light insulating threads. X is charged positively. Y is negatively charged. Z is positively charged.
The following procedures are carried out:
1> Z is earthed and the earthing connection is then removed.
2> Y&Z are brought into contact and then separated
3> X&Y are brought into contact and then separated.
What is the resulting charges on Y & Z?
p/s >> i do not know how to create a new topic – Physics . can someone tell me how to do it.
Also how to remove/delete a post?? -
My son was all the way from K2-P2 having tuition there in Jurong West branch, without informing parents, the new management has taken over, and all the tutors are new .
I have not met anyone of them but am thinking twice if I should keep putting my child there for his P3 tuition and my P1 child too,
Anyone from there ? -
Dear parent,
I am actually one of the members from the new management at KRTC Jurong West Branch.
Firstly, I would like to thank you for supporting us in the past few years. We have changed a management as the previous operator, Diana, decided to handover the centre back to our HQ so that she can spend more time with her son who will be in P6 next year. We actually tried to call all the parents to inform them regarding the change of management, however, we are unable to reach all the parents.
After handing over the centre back from Diana, we interviewed all the existing teachers, and we realized many of them did not meet the minimum requirements set by our HQ. Therefore, we decided to invite some teachers from the HQ. These newly recruited teachers are relatively new in our centre in Jurong West, however, they are all very experienced in their respective field. They are either NIE trained teacher, MOE teacher, or subject specialist with years of experiences. In addition, we will also limit the class size starting from this year. All classes will only have a maximum of 8 students in order to improve the learning effectiveness. You may view our tutors' profile from the following website :
http://krtc-jw.sg/tutors-profile/
The timetable is also available at:
http://krtc-jw.sg/timetables/
Last but not least, we do offer one complete trial lesson for all students. Therefore, you may bring your children to our centre for a trial lesson, and have a conversation with our teacher so that you can make a better decision.
Thanks! Merry Christmas and Happy New Year to you and your family!
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