Word Problem Worksheet - Class Viii - Atomic Energy Education Society Page 2
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1
2
3
411.
Twice the number is 100% increase in the number. If we take half the number,
the decrease in percent is
a) 25
b) 20
c) 50
d) 10
12.
Two cubes of edge 5 cm are joined end to end. The surface area of the resulting
cuboid is
2
2
2
2
a) 125 cm
b) 240 cm
c) 250 cm
d) 500 cm
13.
The expression, 0.0006 + 0.0084 in the standard form is
-3
-4
-2
-2
a) 9 ×10
b) 9 ×10
c) 9 ×10
d) 1.44 ×10
3
2
– 6x + 3x
– 7 is
14.
The degree of the polynomial 4x
a) 0
b) 1
c) 2
d) 3
15.
The x-coordinate of any point on the y-axis is
b) –1
a) 1
c) 0
d) none of these
SECTION B
Answer the following questions.
Is there an error in this statement 4(x – 5) = 4x – 5? If yes, then find the error and
16.
write the correct the statement.
17.
A shop gives 20% discount on an article marked at Rs 120. What is the sale
price?
18.
A loaded truck travels 14 km in 25 minutes. If the speed remains the same, how
far can it travel in 5 hours?
Subtract 4a – 7ab + 3b + 12 from 12a – 9 ab + 5b – 3.
19.
–3
–4
–2
20.
Simplify (–2)
× (–2)
× (–2)
and express in exponential form.
21.
Can a polyhedron have 10 faces, 20 edges and 15 vertices? Justify the answer.
2
22.
Obtain the product: (4p
+ 5p + 7) × 3p.
23.
A farmer has enough food to feed 20 animals in his cattle for 6 days. How long
would the food last, if there were 10 more animals in his cattle?
24.
Find the height of a cuboid whose base
2
3
C
area is 180cm
and volume is 900cm
.
N
25.
Find the area of quadrilateral ABCD in which
5 cm
M
A
BM and DN are perpendiculars to AC.
–3
m
5
26.
Find the value of m for which 5
÷ 5
= 5
.
D
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