Q&A - P5 Math
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MGS SA2 2011
Q26
Jerry had some beads. He can divide them equally into 2, 5 or 7 groups. What was the max. number of beads that he had if he had less than 250 beads?
Q29
The figure below has a perimeter of 36cm. It is made up of 9 identical triangles. What is the increase in the perimeter of the figure when a row of triangles is added to the base?
Regret that I do not know how to incorporate the figure here.
My solution: 36/9= 4cm
Increase triangles = 9 - 4base, 2 sides
Hence 6x4=24cm
However answer is only 12cm?
Pls help! -
Superbugs:
HiMGS SA2 2011
Q26
Jerry had some beads. He can divide them equally into 2, 5 or 7 groups. What was the max. number of beads that he had if he had less than 250 beads?
For Q26, find the common multiple of 2, 5 and 7 closest to 250, the answer is 210.
A common method used in primary maths is “Systematic Listing”
A faster way to find the lowest multiple of 70 and multiply by 3.
Best wishes -
Superbugs:
HiMGS SA2 2011
Q26
Jerry had some beads. He can divide them equally into 2, 5 or 7 groups. What was the max. number of beads that he had if he had less than 250 beads?
Q29
The figure below has a perimeter of 36cm. It is made up of 9 identical triangles. What is the increase in the perimeter of the figure when a row of triangles is added to the base?
Regret that I do not know how to incorporate the figure here.
My solution: 36/9= 4cm
Increase triangles = 9 - 4base, 2 sides
Hence 6x4=24cm
However answer is only 12cm?
Pls help!
for q29.. if the figure is as shown, then the increase in perimeter is in red.![](\"http://i53.tinypic.com/why5nm.jpg\")
http://i53.tinypic.com/why5nm.jpg\">
cheers. -
To MazzIzzzFun,
The figure is right! Tks so
Much for your explanation! -
Aitong SA2 P2 Q9
ABCD us a rectangle. It is divided into 4 unequal triangles P, Q, R and S which meet at a point as shown (sorry I am unable to draw the figure here). Find the area of triangle S.
Assume Meet point is H, Some other information:
Triangle ABH - 24cm
Triangle ADH - 51cm2
Triangle CHD - 45cm2
Both ABH and CHD shares the same base (breadth of rectangle)
Kindly assist. Tks -
Aitong P2 Q17
The ratio of Steven’s cards to Benny’s cards was 3:4. After Steven bought another 9 cards and Benny lost 18 cards, the ratio became 3:2. Find the total number of cards Steven and Benny had at first?
Pls help. Tks -
Superbugs:
Hi superbug, Mathizzfun already replied to my post, It the same question.Aitong P2 Q17
The ratio of Steven's cards to Benny's cards was 3:4. After Steven bought another 9 cards and Benny lost 18 cards, the ratio became 3:2. Find the total number of cards Steven and Benny had at first?
Pls help. Tks -
Yes got it from earlier trails. Tks a lot!
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Hi, anyone can help. Ai tong paper 2 question 2).
I am thinking of 2 numbers, A and B. 1/3 of A has the same value as 5/6 of B. If their difference is 36 , what is their sum?
Question 15) 608 Children took park in a skipping competition. Altogether 110 glod awards were presented to 1/5 of the boys and 1/7 of the girls. How many boys took part in the competion? -
Aitong SA2 P2 Q14
Anyone got solution to angle y? Sorry I do not know how to post the diagram here! Tks
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