Thanks Christina 👍👍

Thank you.

Essentially this model is the algebra method. Can slowly introduce algebra to kids in this way.

Agreed, using this method is easier than drawing model. Thks!

You are most welcomed

Correct but the final ans is wrong. Multiplication is wrong. 95x72 =6840

Oh yeah! Thanks Shirley 😊

if not drawn to scale, it can well be a 6x1 box and a 15x1 box which will make it 6+1+6+15+1+15 = 44cm

it can also be 2x3 and 5x3 boxes which means 2+3+2+5+3+5 = 20cm

you can also combine the boxes to make it 21cm2. Then it can be 7+3+7+3 = 20cm. or 21+1+21+1 = 44cm

So not too sure if there is one answer.

The answer is 20. If I understand it correctly, the method is to look for common factors of 60 and 15 to find the breath and length.

Thanks Caleb

i am saying can also be 44cm.

Noted. Thanks

Find HCF of 15 and 6-which is 3. From there 3x_=15;3×_=6 U get 3x5=15 & 3x2=6 So perimeter is 3+3+5+5+2+2=20 cm

The conditions given in the question is not sufficient to ensure 20 as the only answer. As pointed out, 44 is another nice answer in whole numbers. If u do not restrict to integers, then you have infinitely many answers that satisfy the conditions.

Hope my son's school teacher's question will be clearer. But thank u for all te different way to solve this questions by using factor

Assumption. 3×5=15 3×2=6 So on so forth

Pattern 1 is 4 x 1 = 4 matchsticks Pattern 2 is 4 x 2 -1 = 7 matchsticks Pattern 3 is 4 X 3 - 2 = 10 matchsticks Pattern N is 4 x N - (N-1) Pattern 16 is 4 x 16 - 15 = 49 matchsticks Pattern 17 is 4 X 17 - 16 = 52 matchsticks So 50 matchsticks will give you 16 squares

Quite difficult to understand the formula. Any easy way??

Pattern need boxes ??

Not formula....observe the pattern and see how No of squares is related to No of matchsticks. pattern 1 has 1 square and has 4 matchsticks. Pattern 2 has two squares(same as Pattern No.)......it will have 4 matchsticks x 2 (no. of square/Pattern No.) - 1 ( 1 less than pattern No.) = 7 matchsticks

Another pattern. 1box= 4 matchsticks = (1×3)+1 2 box = 7 = (2×3)+1 N box = 50 = 3n +1 N = 16

Observe the Pattern... 1) 4 x 1 - 0 = 4 2) 4 x 2 - 1 = 7 3) 4 X 3 - 2 = 10 4) 4 x 4 - 3 = 13 5) 4 x 5 - 4 = 16 6) 4 X 6 - 5 = 19 7) 4 X 7 - 6 = 22 16) 4 x 16 - 15 = 49 matchsticks

I think it can also be solved as: 50-4 = 46, Then take 46/3 = 15 r1, 15 squares + 1 (fr the 1st square)=16squares.

Thanks everyone for your help