I also get 2.5 but not sure if it can be in decimal.

I also got 2.5 but teacher says is wrong

Fig 1: 1/2 x 24 = 12 1/3 x 24 = 8 12 - 8 = 4 Fig 2: 1/3 x 36 = 12 1/4 x 36 = 9 12 - 9 = 3 Fig 3: 1/2 x 20 = 10 1/4 x 20 = 5 10 - 5 = 5

Its 5:) although instead of getting the difference of each fraction of the number on top (1/2 of 20 is 10, 1/4 of 20 is 5) I saw that the greatest common factor of each example had the same answer as well☺

Yes it is 5

24 x 1/2 x 1/3 = 4 36 x 1/3 x 1/4 = 3 20 x 1/2 x 1/4 = 2.5 ans = 2.5

Actually, this question is considered ambiguous. With only two complete examples in the sequence, there are many ways to interpret the pattern. Both 2.5 and 5 should be accepted because they are both reasonable answers. Unless the question specifies that the missing number is an integer or whole number, otherwise the teacher should accept the answer 2.5.

We can go by the common denominator or the two given fractions, 6, 12, and 4 respectively. 20/4=5

Thanks all. I also think we shouldn't be faulted for answer in fraction since the question has fractions itself.

5 .

Just multiply the fraction to the top number and find the deference

Thanks KH Puah !

Thanks Yeo See Yeong!

suppose all are stools--> 54 legs we need 10 more legs 1 chair has 1 more leg than 1 stool chairs needed --> 10/1＝10

number of stools ＝18-10＝8.

My boy's working Used the least number of legs x total items 3 x 18 = 54 After minus fr total legs 64-54 = 10 10 is for chair 18-10 = 8 stools

Or can draw 18 circles first with 3 legs n assume all are stools Then start to add on additional legs to make them become chairs till there are 64 legs in all. Easier to understand for kids who are visual.

For P3 you should apply guess and check for this type of questions

8 legs = 2 chairs , 9 legs = 3 stool = 17 legs 16 legs = 4 chairs , 18 legs = 6 stools = 34 legs 36legs = 9 chairs , 21legs = 7 stools = 57 legs 40 legs = 10 chairs , 24legs = 8 stools 40+24= 64 legs Revised din saw the total 18 chairs

Assume all chairs 18x4=72 72-64=8 4-3=1 8 divide by 1=8(stools) 18-8=10(chairs)

Given that the child is in P3, we should use the Guess and Check. The assumption method is probably best introduce at a later age, probably P5 or P6.

All the chairs and stools have at least 3 legs. So because there are 18 items, then 54 legs are used up (18x3) ensuring that each item has at least 3 legs. So because you have 10 extra legs of the total of 64 legs, the 10 can only belong to chairs, with one extra leg per chair, meaning there are 10 chairs. And because you only have 18 items, the other 8 must be stools.

Sorry, x is supposed to be delivery due date.

I'm not quite sure ur solution is correct cos 20088/206 is not a whole number. I maybe wrong but I'm assuming to b whole number 😓 BUT I do not have the solution now too....

Hi Lydia Wade, you are right that it is not a whole number. It would need to produce 97.51units per day to produce 20,088 laptops by the delivery date. Which is not possible. Hence it will either complete production before or after the delivery date. Maybe I am wrong.. I don't know.

Hi See Yeong, I have no idea too! I'm still trying to solve it! My poor old brain...

Hi See Yeong, ur answer is correct. My hubby explained ur models and then also solved it using simultaneous equations to arrive exactly to ur numbers. Clever people :))

See Yeong's answer is correct. Amt of laptops is 20088 and must b completed in 206 days. Note that the question only asking for days given to complete certain amount of laptops. We can imagine if we were given the task, how should we plan the production. 20088/206=97.514563. If produce 97 daily, still short of 106. Therefore out of the 206 days, 106 days need to produce 98 laptops and the rest of 100 days only need to produce 97 laptops.