## Question 1.

## State whether or not the following elements form a set; if not, give reason:

## (i) All easy problems in your text book.

## (ii) All three sided figures.

## (iii) The first five counting numbers.

## (iv) All the tall boys of your class.

## (v) The last three days of the week.

## (vi) All triangles that are difficult to draw.

## (vii) The first three letters of the English alphabet.

## (viii) All tasty fruits.

## (ix) All clever boys of class 6.

## (x) All good schools in Delhi.

## (xi) All the girls in your class, whose heights are less than your height.

## (xii) All the boys in your class, whose heights are more than your height.

## (xiii) All the problems in your Mathematics book, which are difficult for Amit.

## Solution:

## Question 1.If set A = {2, 3, 4, 5, 6}, state which of the following statements arc true and which are false :

## (i) 2 âˆˆ A

## (ii) 5, 6 âˆˆ A

## (iii) 3, 4, 7 âˆˆ A

## (iv) 2, 8 âˆˆ A

## Solution:

Solution