I will name the shaded area SIDES as "up", "down","left","right". Length of left segments＝ length of right ＝ 45cm

length of up ＝ length of down segments together ＝3x15cm+19cm ＝64cm

total perimeter＝45cm+45cm+64cm+64cm ＝218cm

Thank u so much..

welcome! hope u can understand! just remem to not get scared by the zig zags when dealing with perimeter. In the big picture, you may realise that many many segments have the same length as a long side which is parallel to it.

(1/5)x100%=20% Bakery Y must give 20% discount to make it similar to bakery X

107% is 81.32(with GST) 100% is 76 (without GST)(discounted price 80% is 76 100% is 95(original price)

Did your child write "80 + 7% = 87%"? That's super dangerous! Correct it quick! GST is always added on to the selling price. Hence, 107% is $81.32. Next, find 100% (which means NO GST), which is $76. Now, $76 is the price after discount. So, 80% of the ORIGINAL price is $76. 100% of that would be $76 / 80 x 100 = $95 (Ans.)

Thank you very much

The question would have been better phrased if it asked for original price without gst? Arguable especially since our prices includes gst. So the before discount price should or can also include gst.

Use ratio

It might help you

Thanks Ida Tan :)

Most welcome :)

29 and 37

The numbers r close (diff is 8). Close to 30 as 30x30=900. Next clue is the last digit of the product : 3 Must b both odd numbers. Out of the 5 pairs, 1,3 - 3,5 - 5,7 - 7,9 - 1,9 , only 2 pairs r possible : 9,7 and 1,3. Try 29 and 37 as well as 33 and 41. Correct answer is 29 and 37.

thx

lol can use algebra? XD

Don't think P6 has learnt 2nd order equation. x(x-8)=1073

thats sad...

29 n 37