For any two real numbers a and b.

a-b2+b-a2 is

3 men dig a hole in 10 days. How many days would it take for 5 men to dg the same hole?

Read the following information and answer the questions given below:

A has 28 elements, B has 32 elements and A U B has 40 elements.

How many elements are present only in B?

Read the following information and answer the questions given below:

A has 28 elements, B has 32 elements and A U B has 40 elements.

How many elements does A ∩ B have?

∆DEF is right angled at E. If tanD = 4/3, then what is the value of tanF ?

∆DEF is right angled at E. If m∠F = 45°, then find the value of (cosecD - 1/√3).

The area of a circle is 38.5 cm2. Find its circumference (in cm).

The length and breadth of a rectangle are 15 cm and 8 cm respectively. Find its area (in cm2)

The bar graph shows the annual sales of the different departments of a company. Study the diagram and answer the following questions

What is the ratio of the annual sales of department B to that of department F?