MATH PRACTICE PROBLEMS FOR 9th GRADE

Problem 1 :

Evaluate the following

Solution

Problem 2 :

Put π and 22/7 in order relation.

 (A) π > 22/7         (B) π < 22/7          (C) π = 22/7

Solution

Problem 3 :

The value of √20-√225+√80

Solution

Problem 4 :

A wall in the form of a rectangle has base 15 m and height 10 m. If the cost of painting the wall is $16 per square meter, find the cost for painting the entire wall.

Solution

Problem 6 :

Find the base of a parallelogram if its area is 40 cm² and altitude is 15 cm.

Solution

Problem 7 :

If the lengths of the sides of a triangle are 11 cm, 60 cm and 61 cm, find the area and perimeter of the  triangle.

Solution

Problem 8 :

A wire of length 264 cm is cut into two equal portions. One portion is bent in the form of a circle and the other in the form of an equilateral triangle. Find the ratio of radius and side length of triangle.

Solution

Problem 9 :

Pablo buys popsicles for his friends. The store sells single popsicles for $1 each, 3 popsicle boxes for $2 each, and 5 popsicle boxes for $3 . What is the greatest number of popsicles that Pablo can buy with $8 ?

Solution

Problem 10 :

Find the perimeter of the sector whose area is 924 square cm and the central angle is 240.

Solution

Answers

1.  25/33

2.  π = 22/7

3.  4√5

4.  2400

5.  7500

6.  8/3 cm

7.  330, 132

8.  21 : 44

9.  13

10. 130 cm

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