Q&A - P4 Math

[chloecube]

The value of 5 in the ten thousands place is ______times it’s value in the hundreds place.

A) 10000. B) 1000 c) 100. D) 10


I do not understand what the question is asking

[tianzhu]

chloecube:

A)What number am I? Two-thirds of it is 40. Two-fifths of it is 24.


B)min is 18 yr older than Ann. In 6 yr time, she will be twice as old as Ann. How old is Ann now?

Hi

(1) A common multiple of 3 and 5 is 15.

2/3 ------- 10 units
2/5 -------- 6 units

10 units ------ 40
1 unit ------ 4

15 units ------ 60

The number is 60

Check
2/3*60 ------- 40
2/5*60 ------ 24


(2) The difference in age between two people always stays the same.

In 6 yr time, she will be twice as old as Ann.

Min ------- 36
Ann ------ 18
Difference ------ 18

Hence, Ann is (18-6) or 12 now.

Best wishes

[tianzhu]

chloecube:

The value of 5 in the ten thousands place is ______times it's value in the hundreds place.

A) 10000. B) 1000 c) 100. D) 10


I do not understand what the question is asking

Hi

The 5 in the ten thousands place has a value of 100 times the 5 in the hundreds place

50000 as compared to 500.

The answer is (c).

Best wishes

[chloecube]

Tianzhu, Thks once again

[chloecube]

Ms Ong has a packet of sweet. If she gives 6 sweets to each pupils, she will have 2 sweet left, if she give 7 sweets to each pupils, she will be short of 11. How many sweets are there in the packet? Howamy pupils does ms Ong have?

[Singfrench]

chloecube:

Ms Ong has a packet of sweet. If she gives 6 sweets to each pupils, she will have 2 sweet left, if she give 7 sweets to each pupils, she will be short of 11. How many sweets are there in the packet? Howamy pupils does ms Ong have?

guess and check...

the columns add2 and takeaway11 must be the same number of sweets...

pupils]\t6 sweets each]\tadd 2 ]\t7 sweets each ] take away 11
10\t ] 60\t ] 62\t ] 70\t ] 59
18\t ] 108\t ] 110\t ] 126\t ] 115
15\t ] 90\t ] 92\t ] 105\t ] 94
13\t ] 78\t ] 80 \t ] 91\t ] 80


Ans: 13 pupils and 80 sweets

hope i'm not wrong with my mental calcs

[Singfrench]

Singfrench:

chloecube:

Ms Ong has a packet of sweet. If she gives 6 sweets to each pupils, she will have 2 sweet left, if she give 7 sweets to each pupils, she will be short of 11. How many sweets are there in the packet? Howamy pupils does ms Ong have?

guess and check...

the columns add2 and takeaway11 must be the same number of sweets...

pupils]\t6 sweets each]\tadd 2 ]\t7 sweets each ] take away 11
10\t ] 60\t ] 62\t ] 70\t ] 59
18\t ] 108\t ] 110\t ] 126\t ] 115
15\t ] 90\t ] 92\t ] 105\t ] 94
13\t ] 78\t ] 80 \t ] 91\t ] 80


Ans: 13 pupils and 80 sweets

hope i'm not wrong with my mental calcs

sorry for the poor format...blur dunno how to do it right here. :oops:

there are basically 5 columns separated by \"]\"

[MathIzzzFun]

chloecube:

Ms Ong has a packet of sweet. If she gives 6 sweets to each pupils, she will have 2 sweet left, if she give 7 sweets to each pupils, she will be short of 11. How many sweets are there in the packet? Howamy pupils does ms Ong have?

Hi

http://i42.tinypic.com/4retdh.jpg\">

http://www.flickr.com/photos/62167097@N02/6967105663/in/photostream

cheers.

[BigDevil]

chloecube:

Ms Ong has a packet of sweet. If she gives 6 sweets to each pupils, she will have 2 sweet left, if she give 7 sweets to each pupils, she will be short of 11. How many sweets are there in the packet? Howamy pupils does ms Ong have?

Ms Ong has 2 extra sweets when handing out 6 sweets to each pupil.

To give out 7 sweets to each pupil, those 2 extra sweets will be given out, and she still needs 11 more.

From that, it can be deduced that number of pupils = 2 + 11 = 13.

So number of sweets = (13 x 6) + 2 = 80

Err....but I don't know how to express the above mathematically. :oops:

[BigDevil]

MathIzzzFun:

http://i44.tinypic.com/2lij13o.jpg\">

:salute: