Question: A circular wheel of diameter 35cm makes 100 revolutions in 1 minute. Calculate the distance covered by the wheel in half an hour. Express your answer in km. Answer: Radius of the wheel: 35 / 2 = 17.5 cm Circumference of the wheel: 2 x Pi x Radius = 2 x 3.14 x 17.5 cm = 109.9 cm Distance c...

A box of pens was divided equally among 32 children.8 of these children gave up 2/5 of their share. As a result, the remaining children each received 4 more pens. How many pens were there in the box? There are 24 remaining children. Each got 4 more pens. So they got 24 x 4 = 96 pens altogether. The...

Amos, Ben and Charles shared the cost of a present. Amos and Ben paid 5/9 of the price of the present. Amos and Charles paid 2/3 of the price of the present. Amos paid $4. How much did the present cost? Amos and Ben paid 5/9. This means Charlie paid 4/9. Amos and Charlie paid 2/3. This means Ben pa...

Question: Eunice, Grace and Joyce collect badges as their hobby. At first, Eunice gave 2/5 of her badges to Grace. Grace then gave 3/8 of what she had to Joyce. Then Joyce gave 1/6 of what she had to Eunice. In the end, they had 150 badges each. How many badges did Eunice have at first? Answer: We w...

Question: Catherine had some money at first. She gave 1/4 of her money to Anne. As a result, Anne had thrice as much as before. Then, Anne gave 1/2 of her money to Bernard. Bernard then had 1 1/2 times as much money as before. Anne still had $129 left. How much money did each child have at first? An...

Hi XYZ1,

I suggest, err on the side of caution, and use the 'se' form as a rule.

Take care.

Question: There are 2617 vehicle in a carpark The number of lorries was 353 less than the number of vans but 562 more than the total number of cars and motorcycles. The motorcycles and cars have 1150 wheels altogether. How many cars are there in the carpark? Answer and approach are the same as Ender...

Please help me with these sums.. Thanks ! :) 1) Mdm Siti made some jellies. She gave 4 less than 50% of all the jellies to her mother. She also gave 6 more than 1/4 of the rest of the jellies to her friends. She then had 15 jellies left. How many jellies did she make together at first ? (48 jellies...

alfretztay wrote:

MathWithModels wrote:

Daddy wrote:

Yes, sorry. I was careless in part b. Thanks for the correction, alfretztay!

MathWithModels.

http://i62.tinypic.com/ajm9nm.jpg We have two ratios here, but they are ratios of two different numbers. This is the units and parts pattern, and this is the way I'll do it. It's not the only way. We use units for Jane and parts for Dinah. Jane (from 25%) 1u : 3u Dinah (from 50%) 1p : 1p The total ...