(i) The number of corners of a quadrilateral

Let it be any quadrilateral the number of corners will always be constant example for a square the number of corners are 4 which is constant which won’t change

(ii) The variable in the equation 2p + 3 = 5

A variable is a letter which can take any value in equation here ‘p’ can take any value hence the variable is ‘p’

(iii) The solution of the equation x + 2 = 3

To find x take the 2 on the right hand side which will become -2 on going to the right as shown

x = 3 – 2

x = 1

therefore, solution of the equation x + 2 = 3 is x = 1

(iv) solution of the equation 2p + 3 = 5

To find x take the 3 on the right hand side which will become -3 on going to the right as shown

2p = 5 – 3

⇒ 2p = 2

⇒ p =

⇒ p = 1

Therefore, solution of the equation 2p + 3 = 5 is p = 1

(v) A sign used in an equation

From the options given in column II its equal to sign (=)