8th Grade Math Practice Test

8TH GRADE MATH PRACTICE TEST

Question 1 :

Find the smallest number by which 3087 should be multiplied to obtain a perfect cube.

(A) 4 (B) 3 (C) 5

Question 2 :

11025 students are sitting in a lawn in such a way that there are many students in a row as there are rows in lawn. Find the number of rows in the lawn.

(A) 205(B) 105(C) 115

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Question 3 :

Evaluate (243)^-2/5

(A) 1/5(B) 1/7(C) 1/9

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Question 4 :

Evaluate (5² + 12²)^1/2

(A) 17 (B) 15 (C) 13

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Question 5 :

If a + b + c = 9 and ab + bc + ca = 23, find the value of a² + b² + c²

(A) 35 (B) 45 (C) 55

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Question 6 :

What is the degree of the polynomial 4 + 3x - 7 x³ + 5 x⁴

(A) 4 (B) 3 (C) 1

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Question 7 :

Solve the following 3x / (2x - 5) = 12/5

(A) 40 kg (B) 36 kg (C) 50 kg

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Question 8 :

The numerator of a rational number is less than its denominator by the number 3. if the numerator becomes three times and the denominator is increased by 20, the new fraction became 1/8. Find the required fraction.

(A) 1/3 (B) 1/2 (C) 1/4

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Question 9 :

In a circle with center O and the radius 13 cm, AB is a chord of length 24 cm.Find the distance between the chord and the center.

(A) 6 cm (B) 8 cm (C) 5 cm

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Question 10 :

Find the value of x ° if the lines AB and CD are parallel to each other