New Trend Mathematics S1A Chapter5既Activity Book

plz..

Rating

1. 1+40%=

A.40.01%

B.40.1%

C.41%

D.140%

2.There are 15 boys among 40 students. What is the percentage of boys?

a.15%

b.25%

c.37.5%

d.60%

3.The cost and the sellling price of a bottle of orange juice are \$8 and \$12 respectively. What is the profit percent in selling a bottle of orange juice?

a.33 1/3

b.40%

c.50%

d.66 2/3%

4.When 200 is decreased by 40%, find the new value.

a.80

b.120

c.160

d.280

5.The marked price of a box of model cars is \$150. It is sold at \$120. What is the discount percent?

a.20%

b.25%

c.75%

d.80%

6.Sam sells a computer game to Adam at \$150. The profit percent is \$25%. Find the original price of the game.

a.\$112.5

b.\$120

c.\$125

d.\$187.5

7.Mr. Wong bought a watch at \$5000.If he sets its marked price as \$x and sells it at 20% discount, he makes no profit or loss. What is the value of x?

a.4000

b.5000

c.6000

d.6250

8.Ming bought 1000 shares of stock A at \$10 per share. The price of each share is increased by 30%, and then decreased by 30%. He now sells all his shares. What is the profit or loss?

a.profit of \$900

b.no profit or loss

c.loss of \$910

d.loss of \$900

9.May bought a jacket at \$100. She sold it to Judy at 10% loss. Judy then sold it to Helen at 20% loss. How much did Helen pay?

a.\$70

b.\$72

c.\$80

d.\$90

10.The marked price of a packet of chocolates is \$10. You can get one more packet of chocolates if you pay \$1 more. What is the discount percent of buying 2 packets of chocolates?

a.10%

b.45%

c.55%

d.90%

2008-02-17 15:36:53 補充：

Section B1. Find the unknown in the following.a) x is 18% of 360.b) 240 is y% of 320.c) 48 is 60% of z2.Evaluate the following and give your answers in decimals.a) 35% 0.125b) 250% - 1.3c) 45% x 60% 80%d) 75%x2.4 / 30%

2008-02-17 15:37:47 補充：

3. The marked price of a video camera was \$2500. Keith bought it at 20% discount and sold it at the marked price. What was his profit percent in selling the video camera?

2008-02-17 15:40:17 補充：

4. The weight of an adult skeleton accounts for about 18% of the total body weight. The femur in the upper of the leg is the longest bone in the body and its length is about 27% of an adult&#39;s height.

2008-02-17 15:40:19 補充：

4. The weight of an adult skeleton accounts for about 18% of the total body weight. The femur in the upper of the leg is the longest bone in the body and its length is about 27% of an adult&#39;s height.

2008-02-17 15:40:52 補充：

a) What is the weight of skeleton of a 75 kg adult?b)How heavy would an adult be if his/her skeleton weighted 15.3 kg?c)if the length of the femur in an adult corpse was 37.8 cm, find the height of the adult.d)do you think the adult in (c) is tall, short or normal in height?

2008-02-17 15:42:02 補充：

5. Maggie wants to buy a TV set and a washing machine. All products in store A are sold at a discount of 15%.

2008-02-17 15:42:28 補充：

The marked prices of TV set and washing machine are \$1500 and \$2500 respectively. The marked prices of the same TV set and washing machine in store B are \$4400 and \$ 2600 respectively. The corresponding discounts arev 10% and 20%.

2008-02-17 15:42:39 補充：

a)How much should be paid if she buys from store A?b)How much should be paid if she buys from store B?c)What should Maggie do to buy them at the lowest price? How much should be paid?