**8th grade math worksheet 3 :**

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 fraction should be added with -4/9 to get 6/17 ?

(A) 104/163 (B) 136/151 (C) 122/153

**Question 2 :**

Find for which value of x is the following equation true? 4^{4x-7} = 4^{x - 1 }.

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

**Question 3 :**

Express 412 x 10^{-9} in standard form.

(A) 41.2 x 10^{7 }(B) 4.12 x 10^{-7 }(C) 4.12 x 10^{9}

**Question 4 :**

Find the value of 5x - 6y - 8z if x = 2, y = 3 and z = -2.

(A) 5 (B) 8 (C) -18

**Question 5 :**

A number is 7 times greater than another number. If their sum is 96, find the numbers.

(A) 49, 51 (B) 84, 12 (C) 21, 75

**Question 6 :**

Which of the following are Pythagorean triplet?

(A) 12, 16, 20 (B) 9, 12, 15 (C) 10, 12, 34

**Question 7 :**

Which of the following is the cube of the even number?

(A) 343 (B) 729 (C) 1728

**Question 8 :**

Find the square root of 98464

(A) 272 (B) 242 (C) 212

For more examples please visit "Square root by long division method"

**Question 9 :**

The sum of two numbers is 80 and their ratio is 3:5.Find the numbers.

(A) 30 and 50 (B) 18 and 30 (C) 21 and 35

**Question 10 :**

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

(A) 90° (B) 123° (C) 57°

Answers:

(1) 122/153

(2) 2

(3) 4.12 x 10^{-7}

(4) 8

(5) 12 and 84

(6) 12, 16, 20

(7) 1728

(8) 272

(9) 30 and 50

(10) 57

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