When a positive integer n is divided by 5 the remainder is 2. What is the remainder when the number 3n is is divided by 5 ?

If (x + k ) is the common factor of x² + ax + b and x² + cx + d , then what is k equal to ?

Directions: The following table represents the percentage marks of four students in six subjects.
Consider the table and answer questions based on it

The average marks obtained by the students in Geography and History are

The product of two numbers is 2028 and their HCF is 13. The number of such pair is-

Find the forth proportional to , and .

Find the cost in rupees for carpeting a room 65dm× 30 dm at Rs. 45 per sq.m

A man travelled a distance of 60 kms in 10 hours . He travelled partly on foot at 5 kms per hour and partly on bicycle at 7 kms per hour . What is the distance travelled on foot ? 

Find co-ordinates of the midpoint of the segment joining points C (3, -5) and D ( -7,3)