8th grade math worksheet 1 :
Here we are going to see 10 practice questions of mixed topics. We have been preparing this set of questions in order to test how you understood the topics.
Question 1 :
What is the value of square root of 81?
(A) 81 (B) 3 (C) 9
Question 2 :
Find the area of a right angled triangle, if the radius of the circumcircle is 5 cm and altitude to the hypotenuse is 4 cm.
(A) 20 cm2 (B) 10 cm2 (C) 30 cm2
Question 3 :
The volume of cubical box is 46.656 cubic meters. Find the length of the side of the cubical box.
(A) 3.6 m (B) 5.2 m (C) 7.8 m
Question 4 :
The sum of the digits of a two digit number is 15 and if 9 is added to the number the digits are interchanged. Find the required number.
(A) 78 (B) 87 (C) 96
Question 5 :
In a circle with center O and radius 17 cm, PQ is a chord at a distance of 8 cm from the center. Find the length of the chord.
(A) 30 cm (B) 15 cm (C) 24 cm
Question 6 :
The radius and height of a cylinder are in the ratio 5:7 and its volume is 550 cm³ find its radius.
(A) 5 cm (B) 6 cm (C) 7 cm
Question 7 :
The mean weight of 4 boys is 56 kg and that of 6 girls in 46 kg. find the combined mean weight of 10 students.
(A) 40 kg (B) 36 kg (C) 50 kg
Question 8 :
The arithmetic mean of 8, 10, x and 12 is 9. Find the value of x.
(A) 6 (B) 8 (C) 9
Question 9 :
Find the number of sides of regular polygon whose exterior angle measure of 45 degree.
(A) 6 sides (B) 8 sides (C) 9 sides
Question 10 :
Simplify the expressions and evaluate them as directed.
x (x-3) + 2 for x = 1
(A) 0 (B) 5 (C) 3
2. 20 cm²
3. 3.6 m
6. 5 cm
7. 50 kg
9. 8 sides
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