4

1 square 2 square 3 square So on so forth

Thanks Pei Ling solve my problem

Welcome

6 by 6 =36 squares

Thanks

Figure 1=1sq Figure 2=4sq Figure 3=9sq From figure 1 to 2, add 3 squares. From figure 2 to 3, add 5 squares. Got see the sequence: +3, +5, +7, +9..... So figure 6 wil have 36 squares.

But if the question is asking for Figure 100 then it will take longer time for u to get the answer

15, 30

May i know how to get 15,30 ?

Count?

Anyway going back to the question u posted, question is wrong lah 1. 1 2. 1 + 4 = 5 3. 1 + 4 + 9 = 14 ... 6. 1 + 4 + 9 + 16 + 25 + 36 = 91 Must count squares of different sizes. .. lol

6 x 6 = 36 as 2 x2 =4

36

Pattern is fig 2 +3 (1 sq +3 = 4), fig 3 +5 (4 + 5 = 9), fig 4 +7 (9 + 7 = 16), fig 5 +9 (16 + 9 = 25), so fig 6 +11 (25 + 11 = 36). Ans is 4.

I got it Pei Ling thanks

6

X2 followed by divide 3

36 squares in figure 6. Pattern is: Figure 1: 1x1 = 1 Figure 2: 2x2 = 4 Figure 3: 3x3 = 9 Figure 6: 6x6 = 36

36

Question should be phrased as "How many small squares are there in Figure 6?"

36

36

Hi Jo Teng, is your child from CHIJ OLQP ? My girl just did this revision paper from school today 😉

Is this for P2? It looks more like for P4 at least.

No is p2 homework papers, is not p4 paper

It should be 6x6=36

6 x 6 = 36

Actually Its square right So fig1 gives 1 sq = 1 fig2 gives 2 sq = 4...... fig6 gives 6 sq = 36 If the question is asked for 100 It will be 100 sq = 10000. Finally we have, n sq = n × n.

Answer should be 91. 1X1=1 2X2=4 3X3=9 4X4=16 5X5=25 6X6=36 1+4+9+16+25+36=91! Lot of people might come to the answer of 36 due to n-square. BUT, the question asked "How many squares are there in figure six?". Thus, 91 is the correct answer NOT 36! Teacher left a huge contestable flaw in this question. There can only be one marking scheme.

Andy Lim exactly what I said. Thanks for sharing my sentiments. Hope this answer ur doubt Tey Pei Ling

Hi, Jo Teng. Very interesting comments here. May I know what's e answer given by e teacher?

36

ans36

36

If u see the figure properly, figure 2 only has 4 (not 5), figure 3 has 9 (not 14)

U sure or not lol. U check again

Sorry it should be 30 for $10

Q27 is $10 instead

I m pretty sure. The question is asking how many squares are there in Figure 6 and not the total number of squares in all the 6 figures

The answer is 2

Haha how many squares means u count the 1 big square too.

Do attempt this question. I m sure u are able to do this as a qualified tuition teacher

😓

If student can point out this mistake, he/she should be given bonus points! 😀😉 Hope to see more ingenious ones around; they'll be our future national leaders! 😊

Gerald Potassium Hydroxide Koh. I have never had any doubt in my way of solving this question in the first place. Any solutions/help in this group are really up to the persons who post the questions to believe or whether they feel comfortable in accepting it or not. Our purpose of posting the solutions is merely trying to help. U have the right not to agree to my solutions .

I just hope that we do not make the student end up with the wrong answers which may affect his results in future n if he should in future decide to take mathematics olympiad

Unless u are very sure that your method is right & my method is wrong, otherwise I do not see the needs to discuss further here. Lets put a stop here. It's never my intention in the first place to make the student end up with wrong answer.

Actually I m pretty sure my method is right n urs is wrong. I also understand u hv no intentions to provide the wrong answer but yes let's put a stop to this

P.s. the answer is 91

I m also very sure that my method is right. U are entitled to your view so am I.

8 + 18 + 9 + 4 + 1 = 40 ☺

74. Don't be lazy

570/38=15 15/4=3.75 0.75*4=3 5*3=15 (there are 3 groups of 4 people and 1 gets to dine free per group, hence 5*3=15) 15+3=18 18-1=17 (must deduct Gerald) Total 17 friends

How u get 47 ?

Do check again

Perhaps u can share how u get 74 if u are so confident u are right.

38 for 5 people

Oh yes Patricia Phua u r right it cost 38 per person. I never own self check ownself. My bad

I am also wrong. Answer should be17.

Haha primary school maths is about who most careful wins. So I primary school never did well

Hi Patricia Phua, can share how you get 17?

Carol Ho, please see the working on top or you can draw the following to your kid so that they understand better.

Ok got it thanks for your help.

My favourite question. Application of math in real life. :)

i think u can solve the qn from this step onwards. :)

I got something similar too. :)

Thanks Vera Koh and Shaoyang Brandon.

answer is 8 goats

guess and check.

Assume all 28 are ducks = 28× 2legs = 56 Remaining 72-56 = 16 Difference between goat's no. Of legs and duck's = 4 - 2 = 2 16 ÷ 2 = 8 goats Ducks = 28 - 8 = 20

Yup. Same as the cats n ducks story. Try that

Guess & check qns... ans is 20 Ducks & 8 Goata

Guess and check method

thank you:)

thank you