1. The average height of a group pf pupils was 1.68m, When 2 new boys each of height 1.62m joined the group , the average height became 1.67m. How many pupils were there in the group in the end?


2. Albert, Ben and Cass each had some marbles. Albert gave 1/3 of his marbles to Cass. Ben also gave 1/3 of his marbles to Cass. Cass put all the marbles together. She then gave 1/5 of her marbles to Ben.
As a result, Albert and Cass had 20 marbles each and Ben had 15 marbles at the end. How many marbles did each of them have at first?

3. Mrs Tay baked 200 mare walnut cookies than chocolate cookies. She sold 75% of walnut cookies and 40% of chocolate cookies. At the end of the day, there were 43 more walnut cookies than chocolate cookies. How many cookies were there at first?

4. Box A, B and C contained some beads. The ratio of the number of beads in Box A to total number of beads was 2:9. She used 1/3 of the beads in Box B and transferred 1/4 of the beads from Box A to Box C. The ratio of the number of beads left in Box B to the number of beads left in Box C was 4:9. If there were 846 beads in Box B at first, what was the total number of beads left in the end?

My son is in 1EP. He also doesn’t have any friend in CCHS. I feel he is very sad. Anyone living around China Town/Outrum park.

Please help to solve this problem sum, thanks!


Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. The ratio of Jim’s sweets to chocolates became 1:7 and the ratio of Ken’s sweets to chocolates became 1:4. How many sweets did Ken buy?

please help to solve the problem.


Mrs Hodge bought three times as many key chains as stuffed toys and spent $124 in total. She spent $64 more on the stuffed toys than the key chains. Given that a stuffed toy cost $8.40 more than a key chain, find the cost of a key chain.

Thanks a lot!

Please help to solve the problem.


1. The ratio of the number of boys to the number of girls was 4:1 for Primary 6A and the ratio of the number of boys to the number of girls was 2:3 for Primary 6B.Both classes had the same number of pupils. After 4 girls left Primary 6A to join Primary 6B, the ratio of the number of boys to the number of girls in Primary 6B became 4:7. How many boys were there in Primary 6A?

2. Janelle went to a florist to buy some flowers. She spent 1/6 of her money on a bouquet of roses and $154 on a bouquet of lilies. She spent 1/9 of her remaining amount on a bouquet of carnation flowers. If the amount of money left was $240 more than 1/4 of the amount she had at first, how much money had she left?

3. There were twice as many chicken puffs as sardine puffs in a pastry shop. After selling 80 chicken puffs and 10 sardine puffs, there were 3 times as many sardine puffs as chicken puffs left in the shop. How many sardine puffs were there in the shop at first?

Thanks a lot!

Please help to solve the problem.


1. The ratio of the number of boys to the number of girls was 4:1 for Primary 9A and the ratio of the number of boys to the number of girls was 2:3 for Primar 6B. Both classes had the same number of pupils. After 4 girls left Primary 6A to join Primary 6B, the ratio of the number of boys to the number of girls in Primary 6B became 4:7. How many boys were there in Primary 6A?

2. Janelle went to a florist to buy some flowers. She spent 1/6 of her money on a bouquet of roses and $154 on a bouquet of lilies. She spent 1/9 of her remaining amount on a bouquet of carnation flowers. If the amount of money left was $240 more than 1/4 of the amount she had at first, how much money had she left?

3. There were twice as many chicken puffs as sardine puffs in a pastry shop. After selling 80 chicken puffs and 10 sardine puffs, there were 3 times as many sardine puffs as chicken puffs left in the shop. How many sardine puffs were there in the shop at first?

Thanks a lot!

Please help to solve the below questions.


1. Richard drove Cindy from Village X to Village Y at a constant speed of 60km/h.
From Village Y, Cindy walked 7km to Village Z at a speed of 4km/h.
From Village Y, Richard turned back to Village X to pick James up.
He drove along the same route at a constant speed of 60km/h to meet Cindy
at Village Z.
They reached Village Z at the same time.
Find the distance beween Village X and Village Z.

2. There were 124 adults in a hall. When 5/8 of the men and 4/7 of the women left the hall, the total number of men and women who remained became 48. How many men were there in the hall at first?

3. Katy had a number of 20-cent coins and Jeremy had a number of 50-cent coins. Katy had 18 more coins than Jeremy but Jeremy had $8.10 more than Katy. express, to the nearest percent, the amount of money Katy had as a percentage of the amount of money Jeremy had.

4.alicia and Bruce are given some money each. If Alicia spends three times as much as Bruce,She will have $1000 more when Bruce has spent all his money. If alicia spends half of what Bruce spends, she will have $2200 when Bruce has spent all his money. What is the total sum of money given to Alicia and Bruce?

Thanks!

please help to solve the below 2 questions.


1. There were some balls in Boxes A,B and C. For every 3 balls in Box A, there were 7 balls in Box. For every 5 balls in Box B, there were 6 balls in Box C. After 48 balls were transferred from Box C to Box A, the ratio of the number of balls in Box A to the number of ball in Box B to the number of balls in Box C became 19:35:38. Find the total number of balls in the three boxes.

2. A motorcyclist travelle from Town A to Town B. It passed a taxi travelling from Town B to Town A. The taxi was traveling at a speed of 90 km/h. The motorcyclist reached Town B 1 1/2 hours after passing the taxi but the taxi was still 25 km away from Twon A. Both the motorcyclist and the taxi did not change their speeds throughout their journeys. If the motorcyclist took 4 hours to complete the shole journey, what was the distance between the two towns?

Thanks!

please help to solve the below 2 questions.


1. There were some balls in Boxes A,B and C. For every 3 balls in Box A, there were 7 balls in Box. For every 5 balls in Box B, there were 6 balls in Box C. After 48 balls were transferred from Box C to Box A, the ratio of the number of balls in Box A to the number of ball in Box B to the number of balls in Box C became 19:35:38. Find the total number of balls in the three boxes.

2. A motorcyclist travelle from Town A to Town B. It passed a taxi travelling from Town B to Town A. The taxi was traveling at a speed of 90 km/h. The motorcyclist reached Town B 1 1/2 hours after passing the taxi but the taxi was still 25 km away from Twon A. Both the motorcyclist and the taxi did not change their speeds throughout their journeys. If the motorcyclist took 4 hours to complete the shole journey, what was the distance between the two towns?

Thanks!

speedmaths.com:

jonaandr:

please help to solve this problem sum.


1. Ken and Sam share some marbles. The ratio of the number of marbles Ken has to the number of marbles Sam has is 5:3. If Ken's marbles increases by 15%, what percentage of Sam's marbles must be decreased so that the total number of marbles they have remained unchanged?

Hi,

One possible method:
Use PIYO - Put in Your Own (numbers)

Let Ken have 500 marbles.
Let Sam have 300 marbles.
(Total = 800 marbles)

Ken's marbles increased by 0.15 x 500 = 75 marbles.

Sam's marbles must decrease by 75 marbles.

Percentage decrease is 75/300 x 100% = 25%

Hope this helps.

Cheers



speedmaths.com


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Thank you very much!!