(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Mathematics

Suppose you are given a circle. Describe a method by which you can find the center of this circle.

State, the following variable is continuous or discrete:
number of children in your class.

State, the following variable is continuous or discrete:
Distance travelled by car.

State, the following variable is continuous or discrete:
Sizes of shoes.

State, the following variable is continuous or discrete: Time.

State, the following variable is continuous or discrete: Number of patients in a hospital.

Show that:

The ratio of the areas of two triangles of the same height is equal to the ratio of their bases.

Show that:
The ratio of the areas of two triangles on the same base is equal to the ratio of their heights.

Fill in the blank :
 A quantity which can very from one individual to another is called a ............. 

Fill in the blank :
Sizes of shoes are ........... variables.

Fill in the blank :
Daily temperatures is ........... variable.

Find the mean of x + 3, x + 5, x + 7, x + 9 and x + 11.

The mean of 15 observations is 32. Find the resulting mean, if the observation is: Increased by 3

The mean of 15 observations is 32. Find the resulting mean, if the observation is: Decreased by 7

The mean of 15 observations is 32. Find the resulting mean, if each observation is:  Multiplied by 2

The mean of 15 observations is 32. Find the resulting mean, if the observation is:  Divided by 0.5

The mean of 15 observations is 32. Find the resulting mean, if the observation is: Increased by 60%

Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if the observations, given above, be: multiplied by 3.

The mean of 15 observations is 32. Find the resulting mean, if the observation is: Decreased by 20%

Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if the observations, given above, be: multiplied by 3 and then divided by 2.