O P Malhotra, S K Gupta and, Anubhuti Gangal Solutions for Chapter: Sets, Exercise 4: Revision Exercise

 Which of the following is not an empty set?

 Which of the following is an infinite set? 

The cardinal number of the set of the letters of the word 'SCHOOL' is 

Which of the following pairs of sets are disjoint sets?

State whether the following pair of sets are equivalent or not. State the pair is equal or not:

$A=\left\{a, e, i, o, u\right\}, B=\left\{0, 1, 2, 3, 4\right\}$

State whether the following pair of sets are equivalent or not. State the pair is equal or not:

$P=\left\{\text{months having} 30 \text{days}\right\}, Q=\left\{\text{letters of word} \mathrm{INDIA}\right\}$

State whether the following pair of sets are equivalent or not. State the pair is equal or not:

$X=\left\{\text{vowels in the word} \mathrm{SECULAR}\right\}, Y=\left\{\text{vowels in the word} \mathrm{PEANUT}\right\}$

State whether the following pair of sets are equivalent or not. State the pair is equal or not:

$A=\left\{\text{Square numbers less than} 6\right\}, B=\left\{\text{Smallest whole number}\right\}$