Q&A - P4 Math

[Maths Olympiad Tutor]

cftan:

Janet thinks of a number that is more than 40 and less than 60.

1,2,4 and 7 are some of its factors. What is the number?

We can disregard one, since it is a factor of all numbers

We can disregard 2, because all multiples of 4 are multiples of 2.

Between 40 and 60, there are only 3 numbers that are factors of 7 - 42, 49 and 56.

56 is the only number that has factors of 4 and 7.

[Poppet]

Sam and Daniel had 1670 marbles altogether.After Sam had given 96 marbles to Daniel, San had four times as many marbles as Daniel.

(a) How many marbles did Daniel have at first?
(b) How many marbles did Sam have in the end?



Can anyone help with this question? :thankyou:

[Garfieldpal]

Poppet:

Sam and Daniel had 1670 marbles altogether.After Sam had given 96 marbles to Daniel, San had four times as many marbles as Daniel.

(a) How many marbles did Daniel have at first?
(b) How many marbles did Sam have in the end?



Can anyone help with this question? :thankyou:

(a) 1670/5=334

Daniel has 334 marbles after Sam gave him 96 marbles.

Hence, 334-96=238

Daniel have 238 marbles at first.

(b) Since Sam have 4 times the marbles Daniel have at the end,

334*4=1336

Sam have 1336 marbles at the end.

I hope this is correct:D

[sembgal]

Garfieldpal:

Poppet:

Sam and Daniel had 1670 marbles altogether.After Sam had given 96 marbles to Daniel, San had four times as many marbles as Daniel.

(a) How many marbles did Daniel have at first?
(b) How many marbles did Sam have in the end?



Can anyone help with this question? :thankyou:

(a) 1670/5=334

Daniel has 334 marbles after Sam gave him 96 marbles.

Hence, 334-96=238

Daniel have 238 marbles at first.

(b) Since Sam have 4 times the marbles Daniel have at the end,

334*4=1336

Sam have 1336 marbles at the end.

I hope this is correct:D

Yup, u r correct. The clue comes from San had four times as many marbles as Daniel. Use model drawing to solve this problem sum.

[fohope]

BigDevil:

http://i47.tinypic.com/2ez5qit.jpg\">

Hi,
Can anyone explain why one unit is u +10?
How do you get 10?

Thanks.

[PapayaDad]

So can give 10 dolls away?

[syeda]

Dear friends,


I have problem in understanding Fractions for 4th grader and my questions are these:

1)1-1/12-5/6

2)2 2/3+1 1/9

3)1 3/8+2 3/4

4)1/2+7/8+1/8

5)1- 2/11-7/11

6)3 1/5-1 7/10

7)8 1/4+7 3/8

Some word problems and Write the improper fraction on number lines…(I will send these later)

Thanks…

[BigDevil]

fohope:

BigDevil:

http://i47.tinypic.com/2ez5qit.jpg\">

Hi,
Can anyone explain why one unit is u +10?
How do you get 10?

Thanks.

u denotes the number of dolls left AFTER Fiona had given 10 away.

So before Fiona gave them away, she had (u+10) dolls.

[fohope]

A big thank you to Papayadad and Big devil for your enlightenment.

[Cher2101]

Hi can you help me on this question>


Jim walked 3/8 km. he jogged 1/2 km longer than his walking distance .

a ) What was the distance he jogged ?
b ) What was the total distance jim covered?