Null vector is represented by ___.

What is mode in the following

2, 3, 4, 5, 1, 2, 7, 8, 6

(a + b)^² + (a - b)^²=_________?

Conjugate of surd a+√b is

The sum of internal angles of the triangle is:

If A = {x, y, z}, and B = {w, x, y} then A∪B=______?

The set {0,1} is closed with respect to the operation of ___?

When x=y then solution set of x+y=6 is ___.

The point (2,-3) lies in quadrant 

If the area of circle is 154cm then its radius will be ___.

The union of two non colinear rays which have common end points is called ____.

If |an + bn|= 0 then what is true …………….?

The x²+6x+9 is a square of ____.

What is a^m/n is equal to______.

The set {-1,-2,-3,…….} is closed with respect to _____?

Sin (60) = ____________?

If set A has four members then the set A×A has ____ members.

A triangle is formed by ____ non-colinear vertices.

If sum of the angles is 180 then angles are called ______.

In a cumulative frequency polygon frequencies are plotted against?

The set having only one element is called____.

Log 10=___.

A parallelogram has vertices.

A ∪ (B ∩  C) =___.