Q&A - PSLE Math

[Dharma]

yeodo:

Hi another question :


Robin, Linda and Ali shared some money exactly. Robin had 3/5 as much money as Linda. Ali had 1/2 of what Linda had. What was the ratio of Robin's money to Ali's money?

Robin : 6u
Linda : 10u
Ali : 5u

Ratio of Robin's money : Ali's money = 6 : 5

[Dharma]

James Ang:

a Number pattern question from FAN Maths's Iexcel


6, 24, 60, 120, 210, __?__

what follows after 210?


most P5 and P6 students can solve them. Try it.

(12 x 28 ) , ( 14 x 36 )

336 , 504

[James Ang]

Dharma:

James Ang:

a Number pattern question from FAN Maths's Iexcel


6, 24, 60, 120, 210, __?__

what follows after 210?


most P5 and P6 students can solve them. Try it.

(12 x 28 ) , ( 14 x 36 )

336 , 504

If you take PSLE you will get A* for Maths I am sure!

[sokmun98]

Muthu and Beng Huat had some money. If Muthu gave Beng Huat $360, both would have equal amount of money. If Beng Huat gave Muthu $180, Beng Huat would have 1/3 as much money as Muthu.

a) How much money did Muthu have?
b) How much money did Beng Huat have?

Pls help. TIA …

[Tang]

James Ang:

Dharma:

[quote=\"James Ang\"]a Number pattern question from FAN Maths's Iexcel


6, 24, 60, 120, 210, __?__

what follows after 210?


most P5 and P6 students can solve them. Try it.

(12 x 28 ) , ( 14 x 36 )

336 , 504

If you take PSLE you will get A* for Maths I am sure! :D[/quote]

Hello,

\"most P5 and P6 students can solve them.\"


\"If you take PSLE you will get A* for Maths\"


Is there a contradiction between the 2 sentences?

[rictaysh]

James Ang:

a Number pattern question from FAN Maths's Iexcel


6, 24, 60, 120, 210, __?__

what follows after 210?


most P5 and P6 students can solve them. Try it.

6= 1x2x3;
24=2x3x4;
60= 3x4x5;
120 = 4x5x6
210 = 5x6x7

Following 2 numbers will be 6x7x8 and 7x8x9

[abc_parent]

Hi everyone, can I just check whether the answer is correct to this question?


Alan, Ben and Charles had 864 trading cards. Ben won some of the cards from Alan and as a result, Ben’s cards increased by 50%. Charles then won some cards from Ben and Charles’ cards increased by 40%. Finally, Charles lost some of his cards to Alan and Alan’s cards increased by 20%. In the end, they realised that they each had an equal number of cards. How many cards did Alan have at first?

Ans: 368

I got
Alan: 432
Ben: 192
Charles: 240

I am quite sure my answer is correct…can someone explain step by step?
Thanks a lot in advance!!!

[Budo]

Hi need help in this question


Andrew and Brian had some money
If Andrew gave Brian $55, the ratio of Andrew to Brian amount is 3:5.
If Brian gave Andrew 20% of this money and $10, Andrew would have $108 more than Brian.
How much do Andrew and Brian have at first?

[Maths Monster]

sokmun98:

Muthu and Beng Huat had some money. If Muthu gave Beng Huat $360, both would have equal amount of money. If Beng Huat gave Muthu $180, Beng Huat would have 1/3 as much money as Muthu.

a) How much money did Muthu have?
b) How much money did Beng Huat have?

Pls help. TIA ..

After M gave B $360:
M [u]
B [u]

Before M gave B $360:
M [u+360]
B [u-360]

B gave M $180:
M [u+360+180]
B [u-360-180]

B would have 1/3 as much money as M:
(u-360-180) x 3 = u+360+180
3u-1620=u+540
u=1080

Therefore,
a) M has u+360 = 1080+360 = $1440
b) B has u-360 = 1080-360 = $720

Check:
B gave M $180:
M = 1440+180 = 1620
B = 720-180 = 540 => 1/3 of M

[Maths Monster]

abc_parent:

Hi everyone, can I just check whether the answer is correct to this question?


Alan, Ben and Charles had 864 trading cards. Ben won some of the cards from Alan and as a result, Ben's cards increased by 50%. Charles then won some cards from Ben and Charles' cards increased by 40%. Finally, Charles lost some of his cards to Alan and Alan's cards increased by 20%. In the end, they realised that they each had an equal number of cards. How many cards did Alan have at first?

Ans: 368

I got
Alan: 432
Ben: 192
Charles: 240

I am quite sure my answer is correct....can someone explain step by step?
Thanks a lot in advance!!!

Work backward:
In the end, they realised that they each had an equal number of cards. Each has 864/3=288
A = 288
B = 288
C = 288

Charles lost some of his cards to Alan and Alan's cards increased by 20%.
A = 288/1.2 = 240
B = 288
C = 288 + (288-240) = 336

Charles then won some cards from Ben and Charles' cards increased by 40%.
A = 240
C = 336/1.4 = 240
B = 288 + (336-240) = 384

Ben won some of the cards from Alan and as a result, Ben's cards increased by 50%.
B = 384/1.5 = 256
A = 240 + (384-256) = 368
C = 240

Therefore, A has 368 at first