23.
[Area]*
28.
[Probability]
Find the area of the shaded triangle below, given
that M, Nand P are midpoints of the sides of
MBC.
A drawer contains three ties, identical except
in color. One is green (G), one black (B)
and one navy (N). Two ties are selected at
random from the drawer. Find the probability
that one of the chosen ties is black.
[Complete the tree diagram belov. to help solve the problem.]
First tie
I
Second tie
B
24.
m2
24 m AiI
I
t
G<::N
~L
---
C
--
- n-
29.
nmm
~--
- --"--
P
B
30 m
...
B<::~
N<::~
Start
90
A
.
..
[Volume]*
A brick 12 cm by 8 cm by 25 cm is dropped into
2
3
a deep rectangulartank which is half full of
water. If the base of the tank is 15 cm wide and
40 cm long, by how much will
4 em
the water level in the tank rise?
[Geometry]
Find the value of x.
[All measurements are in em.]
30.
[Surface Area]
*
Using S.A. = 4xr2 and x z 3.14, find the
surface area of the sphere below.
1.2
25.
78.5 mm 2
[Angles]
*
Find the value of the smallest angle in the
triangle
below.
~
[Trianglenot drawnto scale.]
31.
[Pythagorean
Theorem
I Trigonometry]
*
Find the value of x, given cos e
xo-
50
= 0.69
7xo
x
26.
[Measurement
I Time]
Change 0.25 acres into square yards.
32.
[Problem Solving 1]
1210 yd2
27.
*
Find positive integers a, b, c and d if:
a + a =b,
b + b = c,
c + c = d and
[Perimeter] *
Find the perimeter of the parallelogram
below.
a + b + C+ d
a
33.
[Problem
Solving
= 360
= 24
2]
b = 48 c = 96 d
=192
*
The sum of x consecutive numbers is 12x + 4.
Find the maximum possible
value of x.
Whrte 4.4@
page 58
Copynght.
Not to be reproduced
without permission.
J. B. Wright - Echuca 2004
w