Explore topic-wise MCQs in Grade8.

This section includes 330 Mcqs, each offering curated multiple-choice questions to sharpen your Grade8 knowledge and support exam preparation. Choose a topic below to get started.

1.

The straight line equation y = 5x - 2 has gradient of

A. x + y
B. xy
C. 2
D. 5
Answer» E.
2.

If the points of the straight line are M(7, 1) and N(7, 2) then the line MN is

A. horizontal line with equation with x = 1
B. vertical line with equation with x = 2
C. vertical line with equation with x = 7
D. vertical line with equation with x = 7
Answer» D. vertical line with equation with x = 7
3.

If coordinates of A and B are (2, 2) and (9, 11) respectively then the length of line segment AB is

A. 11.4
B. 13.4
C. 15.4
D. 17.4
Answer» B. 13.4
4.

According to Pythagoras theorem, the distance between points (-3, 8) and (8, -5) is

A. 19.03 units
B. 11.03 units
C. 15.03 units
D. 17.03 units
Answer» E.
5.

If a line passes through point A(0, c) and has gradient 'm' then the equation will be

A. y = mx + c
B. c = xy + m
C. m = xy + c
D. cx = y + m
Answer» B. c = xy + m
6.

If (94 )2 = 3x then the value of 'x' is

A. 14
B. 16
C. 15
D. 17
Answer» C. 15
7.

If 36 ⁄27 = 3x then the value of 'x' is

A. 3
B. 4
C. 5
D. 2
Answer» B. 4
8.

The answer of 9.5 x 105 ⁄104 in ordinary notation is

A. 0.95
B. 0.095
C. 95
D. 0.0095
Answer» D. 0.0095
9.

The product of y7 and y³ is equal to

A. y10
B. y21
C. y4
D.
Answer» B. y21
10.

The product of a²b4 and a³b5 is

A. a10 b20
B. a5 b9
C. a4 b6
D. a6 b7
Answer» C. a4 b6
11.

Mary scored 200 marks in three tests. If average score of 60 is required then the lowest marks she must score for fourth test are

A. x gt; 40
B. x gt; 50
C. x gt; 60
D. x gt; 70
Answer» B. x gt; 50
12.

By solving the inequality 1⁄3(x - 3) > 1⁄2(x + 2), the answer will be

A. x < -10
B. x < -12
C. x < -14
D. x < -15
Answer» C. x < -14
13.

By solving the inequality 3(a - 6) &lt; 4 + a, the answer will be

A. a < 9
B. a < 12
C. a < 13
D. a < 11
Answer» E.
14.

By solving the inequality 6x - 7 &gt; 5, the answer will be

A. x > 6
B. x < 5
C. x < 7
D. x > 2
Answer» E.
15.

If -5 &gt; a and a &gt; b then -5 is

A. less than a
B. greater than b
C. grater than a
D. less than b
Answer» C. grater than a
16.

The compound interest on $2500 for 5 years at 4% per annum (compounded annually) is

A. $432
B. $542
C. $642
D. $452
Answer» C. $642
17.

If an article costs $350 with 6% GST then the price customer has to pay is

A. $362
B. $351
C. $371
D. $341
Answer» D. $341
18.

The television is priced at $10,000. A deposit of 16% on simple interest of 11% per year over 2 year and repayments paid monthly then the monthly installment is

A. $457
B. $447
C. $437
D. $427
Answer» E.
19.

In a city book store, 70% of books are classified as non-fiction and remainder as fiction. There are total 2400 more non-fiction books than fiction books. The owner wants to increase non-fiction books by 5% at an average cost of $22. The cost of new non-fiction books is

A. $4,620
B. $4,500
C. $4,350
D. $5,250
Answer» B. $4,500
20.

A refrigerator is priced at $10,000. A deposit of 16% on simple interest of 11% per year over 2 year and repayments paid monthly then the amount of deposit made is

A. $2,000
B. $2,150
C. $1,950
D. $1,600
Answer» E.
21.

Considering radian, the value of tan 1.1 is

A. 1.964
B. 0.857
C. 0.382
D. 0.457
Answer» B. 0.857
22.

In the formula 2πr, the 'r' is considered as

A. circumference
B. area
C. perimeter
D. radius
Answer» E.
23.

The quarter of the circle is

A. minor segment
B. chord
C. quadrant
D. semicircle
Answer» D. semicircle
24.

The formula used to measure circumference of circle is

A. 2πr
B. πr² + 2r
C. πr²
D. πr²
Answer» B. πr² + 2r
25.

If the arc of circle of radius 30 cm has a length of 19 cm then the angle subtended at center of circle is

A. 51.28
B. 16.28
C. 46.28
D. 36.28
Answer» E.
26.

The measurements such as length of book and width of glass sheet by using measuring tape are called

A. indirect measurementsdirect measurements
B. indirect measurementsdirect measurements
C. indirect measurements
D. direct measurements
Answer» E.
27.

If sin A is 0.865 then the value of angle A (four significant figures) is

A. 85.59°
B. 59.88°
C. 62.88°
D. 88.62°
Answer» C. 62.88°
28.

The answer of sin 95.29° is

A. 0.7955
B. 0.9957
C. 0.5957
D. 0.5997
Answer» C. 0.5957
29.

Considering a right-angled triangle ABC, if opposite side is 'x' and adjacent side of triangle is equal to 20 then A 53° is

A. 23.46
B. 24.46
C. 26.54
D. 28.64
Answer» D. 28.64
30.

A ladder leans against the wall at the point B (window end) from a ground level and makes an angle horizontally at 52°. The height of ladder is 15 m. When the same ladder leans above the point B at point A (window start) and makes an angle of 85° horizontally. The distance between point A and point B is

A. 12.4 m
B. 5 m
C. 4.12 m
D. 3.12 m
Answer» E.
31.

The sine rule for a triangle states that

A. a/sin A = b/sin B = c/sin C
B. sin A/a = sin B/b = sin C/c
C. a/sin A + b/sin B + c/sin C
D. 2a/sin A = 2b/sin B = 2c/sin C
Answer» C. a/sin A + b/sin B + c/sin C
32.

Considering The Cosine Rule of any triangle ABC, the possible measures of angle A includes

A. angle A is obtuse
B. angle A is acute
C. angle A is right-angle
D. all of above
Answer» E.
33.

In a triangle ABC, if angle A = 72°, angle B = 48° and c = 9 cm then the &amp;Ccirc; is

A. 69°
B. 66°
C. 60°
D. 63°
Answer» D. 63°
34.

For the Cosine Rule of any triangle ABC, the c² is equal to

A. c² + a² + 2ac cos C
B. a² + b² - 2ab cos C
C. a² + b² + 2ab cos A
D. a² - b² + 2ab sin A
Answer» C. a² + b² + 2ab cos A
35.

For the Cosine Rule of any triangle ABC, the b² is equal to

A. a² - c² + 2ab cos A
B. a³ + c³ - 3ab cos A
C. a² + c² - 2ac cos B
D. a² - c² 4bc cos A
Answer» D. a² - c² 4bc cos A
36.

In a right-angled triangle XYZ with respect to X, the tangent of the angle A is calculated as

A. adjacent side/hypotenuse
B. opposite side/hypotenuse
C. opposite side/adjacent side
D. hypotenuse + adjacent side
Answer» D. hypotenuse + adjacent side
37.

If cos X is 0.438 then the value of angle X in a right angle triangle is

A. 64.02°
B. 66.02°
C. 46.02°
D. 84.02°
Answer» B. 66.02°
38.

From the top of mountain 68 m high, the angle of depression of two boats due east of it are 52° and 26° respectively. The distance between the ships is

A. 58.28 m
B. 86.29 m
C. 68.29 m
D. 53.72 m
Answer» C. 68.29 m
39.

The answer of 4 tan 65°/3 sin 19° is

A. 0.9309
B. 0.3099
C. 0.1309
D. 0.3019
Answer» B. 0.3099
40.

With respect to A in a right-angled triangle ABC, the side AB is called

A. adjacent side
B. opposite side
C. hypotenuse
D. adjacent side + opposite side
Answer» B. opposite side
41.

By converting 3π⁄2 from radians to degrees, the answer will be

A. 190°
B. 150°
C. 270°
D. 290°
Answer» D. 290°
42.

The formula used to measure area of circle is

A. 4πr²
B. πr²
C. 2πr²
D. πr² + 2r
Answer» C. 2πr²
43.

Considering radian, the value of cos 2.3π is

A. 1.832
B. 0.587
C. 2.587
D. 1.684
Answer» C. 2.587
44.

If the radius is 21 cm and the angle at center of circle is 140° then the length of the arc is

A. 42.23 cm
B. 73.24 cm
C. 51.31 cm
D. 62.42 cm
Answer» D. 62.42 cm
45.

If the angle of sector is z° then the formula used to calculate is

A. z°⁄360° x area of major arc
B. z°⁄360° x area of semicircle
C. z°⁄360° x area of circle
D. z°⁄360° x circumference
Answer» E.
46.

If cos 55° and sin 55° = 0.8 each then the answer of cos 125° + 5 sin 55° is

A. 2.4
B. 2.8
C. 3.2
D. 0.8
Answer» B. 2.8
47.

Considering the Cosine rule, the cos C is equal to

A. a² - b² - c²⁄2bc
B. 2a² + 2b² + 2c²⁄2abc
C. a² + b² - c²⁄2ab
D. 2a + 2b - 2c⁄2ac
Answer» D. 2a + 2b - 2c⁄2ac
48.

In Δ ABC, angle A = 110° and AC = 2AB. If the area of Δ ABC is 15.5 cm² then the length of AB is

A. 3.06 cm
B. 6.05 cm
C. 4.06 cm
D. 5.06 cm
Answer» D. 5.06 cm
49.

The formula for the area of a triangle ABC is

A. 1/2ab sin C + 1/2bc sin A + 1/2ac sin B
B. 1/2ab sin C = 1/2bc sin A = 1/2ac sin B
C. 3/2ab sin C = 3/2bc sin A = 3/2ac sin B
D. 2ab sin C = 2bc sin A = 2ac sin B
Answer» C. 3/2ab sin C = 3/2bc sin A = 3/2ac sin B
50.

Considering 0° &lt; x &lt; 180°, the angle of sin x = 0.2385 is

A. 21°, 170.32°
B. 18.02°, 165.02°
C. 14°, 150°
D. 13.80°, 166.20°
Answer» E.