Search found 19 matches

by Jmaths.SG
Mon May 23, 2016 10:24 pm
Forum: Primary 6 & PSLE
Topic: Q&A - PSLE Math
Replies: 17002
Views: 2166396

Re: Q&A - PSLE Math

Hi all, ps help. Many tks and God Bless:) (1) James used 4/7 of his screws and 3/5 of his nails to construct a wooden cupboard. In the end, he had an equal number of screws and nails left. Given that James had a total of 145 screws and nails at first, how many nails did he use to construct the wood...
by Jmaths.SG
Tue May 17, 2016 1:17 pm
Forum: Primary Schools - Academic Support
Topic: Ask me Maths questions!
Replies: 1
Views: 1303

Re: Ask me Maths questions!

bumpz!
by Jmaths.SG
Fri May 13, 2016 2:47 pm
Forum: Primary Schools - Academic Support
Topic: Ask me Maths questions!
Replies: 1
Views: 1303

Ask me Maths questions!

I'm a person who likes to solve maths questions, and I have noticed that quite a few parents are seeking help on it. I will be happy to help anyone, parents or students, who needs help in solving a maths question =) have also set up a Facebook page if you want to post your picture of the problem eas...
by Jmaths.SG
Tue May 03, 2016 9:03 am
Forum: Secondary Schools - Academic Support
Topic: Lower Secondary Mathematics
Replies: 346
Views: 93976

Re: Lower Secondary Mathematics

Kindly help with the following qn, thanks. Without drawing the graphs, explain why the simultaneous equations y = -2x + 5 y = 2x - 33 have no solution Hi, is there any typo error in the question? I am able to find the solution, which is x= 9.5 and y=-14. ...... likewise. But since it has been a whi...
by Jmaths.SG
Tue May 03, 2016 8:55 am
Forum: Primary 6 & PSLE
Topic: Q&A - PSLE Math
Replies: 17002
Views: 2166396

Re: Q&A - PSLE Math

ozora wrote:May I know is there any other alternative method to find 2 to power of 20 besides using calculator?
Any short cut method or formula?
Don't really have any smart ideas, but you can try...

2^20
= 4^10
= 16^5
= 16*16*16*16*16
by Jmaths.SG
Sat Apr 23, 2016 12:11 am
Forum: Primary 6 & PSLE
Topic: Q&A - PSLE Math
Replies: 17002
Views: 2166396

Re: Q&A - PSLE Math

Please help the following qtn, thks! Find the smallest positive integer, n, such that 42n is a multiple of 180 Reduce 180 and 42 to multiples of prime numbers. 180 = 2 * 2 * 3 * 3 * 5 42 = 2 * 3 * 7 Some numbers must be multipled to 42 in order to become a multiple of 180. These numbers must includ...
by Jmaths.SG
Thu Apr 21, 2016 9:56 pm
Forum: Secondary Schools - Academic Support
Topic: Lower Secondary Mathematics
Replies: 346
Views: 93976

Re: Lower Secondary Mathematics

Can anyone help me with this question. 1. The sine of an angle is 0.7420. Give two possible values for the angle in degrees. Answer: ______________ or ______________ :thankyou: sin (angle) = positive, when 0 < angle < 180 sin (angle) = negative, when 180 < angle < 360 Since sin (angle) = 0.7420 -> ...
by Jmaths.SG
Tue Apr 19, 2016 9:22 pm
Forum: Secondary Schools - Academic Support
Topic: O-Level Elementary Math
Replies: 162
Views: 57087

Re: O-Level Elementary Math

Need help with the following A car and a motorcycle travelled from Bugis to Kallang and the speed-time graph of their journey is shown below. Both vehicles left Bugis together and took the same route. Find (c) the time t at which the motorcycle overtook the car. (You may assume that t > 2) [img][IM...
by Jmaths.SG
Tue Apr 19, 2016 8:51 pm
Forum: Secondary Schools - Academic Support
Topic: O-Level Elementary Math
Replies: 162
Views: 57087

Re: O-Level Elementary Math

questionable_i wrote: 2. The coordinates of the point P and Q are (-2,7) and (3,-6) respectively.
(a) Find the equation of the line joining the points P and Q.
(b) Hence, find the coordinates of the point where the line PQ crosses the x-axis.

:thankyou:
Image
by Jmaths.SG
Tue Apr 19, 2016 8:49 pm
Forum: Secondary Schools - Academic Support
Topic: O-Level Elementary Math
Replies: 162
Views: 57087

Re: O-Level Elementary Math

Can anyone help me with these two questions? 1. It is given that O is the origin, A is the point (2,1) and B is the point (12,10). (a) Find the equation of line AB (b) A straight line l is parallel to the line AB and passes through the origin. Write down the equation of the line l http://i.imgur.co...