Square of Pattern no. = the no. of shaded squares; No. of unshaded squares = (Pattern no. + 2) squared minus the no. of shaded squares (i.e. Square of Pattern no.)

First, from your child's work, we can observe that the number of unshaded squares are multiples of 4... Pattern 1: 4x2; Pattern 2: 4x3; Pattern 3: 4x4. Next, we see the number that changes is always the Pattern number add 1. So, 4x?=196; ?=49. Therefore Pattern number is (49-1) which 48. Answer: Pattern 48 will have 196 unshaded squares.

Thank you

I'm wrong. I have Pattern 48 for (c)

Actually the answer given is 48 too

Thanks again, Lucie!

Diff between K and N seashells = 1071-826 = 245 Everyday N collects =(15-8) = 7 seashells more than K In order for N to narrow the lead and then have the same number of seashells as K, the numbers of days required = 245/7 = 35 days

Ans. is 35. initial difference between K & N = 1071 - 826 = 245. Thereafter, for every 8 seashells tt K collects, N collects 15. 15 - 8 = 7. This means tt N narrows the initial gap between N & K by 7 each day. So, to catch up with K (i.e. hv equal no. of seashells as K), it'll take 245 ÷ 7 = 35 days (Ans.)

Thanks! Is there any way to make him visualize?

How abt in models format?

Students may use the heuristic: "use small numbers" to help them visualize the problem. Say at first K and N have 20 and 10 seashells respectively. Ask, "how many seashells should they collect so that they will have the same number of seashells?" (N should collect 10 more seashells than K.) For example, K collects 5 seashells and N collects 15 seashells. When returning to the original problem, students will realize that N collects 7 more seashells than K each day. Ask, "how many days will it take to make N=K?" ( [] x7 = Difference) Therefore, Number of days = Difference / 7. .

Thank u fr the clear explanation

Can this problem sum be done in model method or wts the best method fr the kids to understand

Has anyone here have any recommendations to a very good assessment book on models n problem sums...tks guys

Students may draw the comparison model to help them visualize that K is 245 more than N. Ask, "how can the two bars be made equal by increasing both K and N?" (N collects more seashells than K.) Ask, "how many more seashells than K did N collect?" (N collected 7 seashells than K each day.) Then ask, "after how many days would N collect a total of 245 seashells than K?" (245/7=35). In this manner the model helps students figure out the answer.

Thk u mr kho.. Do u hve any recommendation fr any assessmnt books based on models n problem sums

Yueh Mei's book should be helpful.

where can we get that book pls

You should be able to get it from Popular.

Well i suppose popular might hve it

Mr kho,,is it really very hard for students to grasp all these problem sums??or is thr a much easier way for them

Students must develop confidence in solving simple problems, then they would try the harder ones. They have different abilities, so we should not be too eager to expect them to solve problems that are appropriate for their level. They should have opportunities to talk about their understanding and reasoning in the process of solving problems. They learn from the process, not from solutions. It is ok if they cannot solve those super challenging or unreasonable problems in the exams, especially those that are far beyond their level.

But i must agree that our maths problems r really hard to handle

Don't push our children too hard if they are not ready to score A*. Let them know that certain questions in the exams are beyond them. They should do their best to do whatever they can. Leave out those problems that are really hard to handle.

No. of students who study only English ➝ 140 - 60 = 80. No. of students who study only Math ➝ 160 - 60 = 100. No. of students who study both English & Math ➝ 60. Therefore, total students in the tuition centre = 80 + 100 + 60 = 240 (Ans.)

Thank you, Lucie. :)

I'll show my boy in this manner. Thanks!

This question can also be explained using Venn diagram, if yr child understands how Venn diagram works :)

I'll show him this and see which one he understands better. Thanks!

See if this bar model is easier for a p4 kid.

Sh Lim, will show my boy your method too. Thanks!