Math Quiz V

1. The product of 2 numbers is 800.
If the first number increases by 20%

and the second reduces by 20 %,
then the new product is

a) 646 b) 768 c) 800 d) 960

2. In the figure find the total area of
the 2 semicircles shown,

given that angle B is 90 deg
and hypotenuseAC = 14 cm

a) 77 sq cm b) 140 sq cm c) 210 sq cm d) 350 sq cm

3. 8 years ago a man was 24 years old.

9 years hence his age will be :

a) 33 years b) 41 years c) 45 years d) 46 years

4. If x times y equals the square of y

then state which of the following is true :

a) x < b) x > y c) x = y d) x = 2

5. A car travels 30 km at 45 kmph
and another 30 km at 60 kmph;

the total travel time 1n minutes was :

a) 50 b) 60 c) 70 d) 80

6. A total of 60 advertisemements were sold
for a school magazine. If 20% of the 1st 20 sold
were in colour, 40% of the next 30sold were in colour,

and 80% of the last 10 sold were in colour,
what percent of the 60 ads sold were in colour?

a) 30% b) 33.33% c) 40% d) 60%

7. A ball is dropped from192 m on level ground
and after the third bounce it rises to a height of 24 m.
If the height to which the ball rises after each bounce
is always the same fraction of the height

reached on its previous bounce, what is the fraction?

a) 1/8 b) 1/4 c) 1/3 d) 1/2

8. Pete is 8 years older than Sam. Four years ago

Sam was half the age Pete is now. Pete's pesent age is:

a) 20 years b) 22 years c) 24 years d) 26 years

9. In the figure, the value of x equals :

a) 25 deg b) 30 deg c) 40 deg d) 45 deg

10. The tip of a fan blade is 2 m from its axis of rotation.

If the fan completes 600 rotations per minute,

how many km does the tip of the blade travel in 1 hour?

a) 60pi km b) 120pi km c) 144 pi km d) 176pi km

----------Answer Key----------

1. (b) 2. (a) 3. (b) 4. (c) 5. (c)

6. (c) 7. (d) 8. (c) 9. (a) 10. (c)