WorksheetsHKDSE A1 questions
Total questions: 10
Worksheet time: 5mins
Mr. Chan bought a car for $143 900. If the value of the car goes down by 10% each year, find its value at the end of the third year. (Give your answer correct to the nearest hundred dollars.)
$94 400
$100 700
$104 900
$115 100
The length of a rectangle is decreased by 20%. If the area remains unchanged, find the percentage increase of its width.
25%
20%
15%
10%
There are 1 200 students in a school, of which 640 are boys and 560 are girls. If 55% of the boys and 40% of the girls wear glasses, what percentage of students in the school wear glasses?
15%
20%
48%
60%
If 125x = 25y and x, y are non-zero, find x : y
1:25
1:5
2:3
3:2
In a map of scale 1 : 500 , the length and breath of a rectangular field are 2 cm and 3 cm respectively. Find
the actual area of this field.
30 m2
150 m2
180 m2
250 m2
The costs of rice of brand A and rice of brand B are $8 / kg and $4 / kg respectively. If x kg of rice of brand A
and y kg of rice of brand B are mixed so that the cost of the mixture is $5 / kg , find x : y .
1:1
1:2
1:3
1:4
Let a and b be non-zero numbers. If 7a + 5b = 3a + 8b , then a : b =
1:2
3:4
2:1
3:2
9 - a2 - b2 + 2ab =
(3 - a + b) (3 + a - b)
(3 + a + b) (3 + a - b)
(a + b - 3) (a + b +3)
(3 - a - b) (3 - a +b)
A box contains two kinds of coins: $ 5 and $ 2. The ratio of the number of $ 5 coins to the number of $ 2 coins is
4 : 5. If the total value of the coins is $ 90, then the total number of coins in the box is
18
21
24
27
The scale of a map is 1 : 800 . If the area of a park on the map is 1 cm2 , then the actual area of the park is
320 m2
160 m2
64 m2
32 m2
