Ask your friend to fill the following table and find the ratio of his age to the corresponding age of his mother .

What do you observe?

The following table shows the ages of the students during a year are : Find the mode.

Find the L.C.M. of the following numbers in which one number is the factor of the other : 6,18 What do you observe in the results obtained.

Find the L.C.M. of the following numbers in which one number is the factor of the other : 5,20 What do you observe in the results obtained.

What are the following and where do you find them in animal body? Axons

Find the L.C.M. of the following numbers in which one number is the factor of the other : 9,45. What do you observe in the results obtained.

Find the L.C.M. of the following numbers in which one number is the factor of the other : 12,48 What do you observe in the results obtained.

What are the following and where do you find them in animal body? Chondrocytes

Form the pair of linear equations in the following problems and find their solution by substitution method : A’s present age is to B’s present age is 7 : 9. Twelve years ago, their ages were in the ratio 3:5. When would the ratio of their ages be 6 : 7 ?