## PST Mock Test 5

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Question 1 |

symbol

**^**is used for:A | Such that |

B | And |

C | Or |

D | None of these |

Question 2 |

The concept about sets was first introduced by:

A | George Floyd |

B | George Orwell |

C | George Knapp |

D | George Cantor |

Question 3 |

Write in Descriptive form: N = { 1, 2, 3, 4, 5, 6, ... }

A | N = Set of all whole numbers |

B | N = Set of all natural numbers |

C | N = set of all integers |

D | N = set of all numbers |

Question 4 |

"D = {x / x ∈ N ^ x > 50}" can also be written as:

A | D = Set of all natural numbers less than 50 |

B | D = { 50, 51, 52, 53......} |

C | D = Set of all integers less than 50 |

D | None of these |

Question 5 |

Which of the following is written in descriptive form?

A | D = Set of first four multiples of 3 |

B | C = {1, 2, 3, 4, 5} |

C | A = {x / x ∈ N ^ x ≤ 10} |

D | None of these |

Question 6 |

"∈" Symbol denotes:

A | Such that |

B | Belongs to |

C | And |

D | Is equal to |

Question 7 |

Write this in set-builder form: S = Set of names of days of a week which start with letter S

A | S = {Saturday, Sunday} |

B | S = { x / x is name of week that starts with S} |

C | S = { x / x is weekday} |

D | Both B & C |

Question 8 |

Write this in descriptive form: W = { 0, 1, 2, 3, 4, 5 }

A | W = { x / x ∈ W ^ 0 ≤ x ≤ 5} |

B | W = { x / x ∈ N ^ 0 ≤ x ≤ 5} |

C | W = Set of first five whole numbers |

D | None of these |

Question 8 Explanation:

Correct Answer:
W = Set of first 6 whole numbers
or
W = Set of Whole Numbers less than or equal to 5

Question 9 |

In tabular form, we tabulate the members of the set within the braces (_____) and separate them by commas

A | Square brackets |

B | Box brackets |

C | Curly brackets |

D | Angle brackets |

Question 10 |

Which of the following is not form of Sets?

A | Descriptive |

B | Tabular |

C | Set-bulber |

D | None of these |

Question 11 |

Set is collection of ________ objects

A | Well-defined and distinct |

B | Well-defined and indefinite |

C | Well-defined and indistinct |

D | Well-defined and nebulose |

Question 12 |

In ______ form, the set is represented by describing the common characteristics of all members using symbols.

A | Descriptive |

B | Tabular |

C | Set-builder |

D | None of these |

Question 13 |

This set "F = Set of first ten prime numbers" can also be written as

A | F = {2, 3, 5, 7, 11, 13, 17, 19, 23, 29} |

B | F = {x/ x is a prime number ^ 2 ≤ x ≤ 30} |

C | F = Set of Prime numbers less than 30 |

D | All of these |

Question 14 |

Write this in Tabular form: C = { a / a ∈ Z ^ 3- ≤ a ≤ 3}

A | Z = {-3, -2, -1, 0, 1, 2, 3} |

B | Z = { 3, 2, 1, 0, -1, -2, -3} |

C | Z = {0, 1, 2, 3} |

D | None of these |

Question 14 Explanation:

Correct Answer is:
C = {-3, -2, -1, 0, 1, 2, 3}

Question 15 |

F = Set of names of days of a week

A | F = {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday} |

B | F = { x / a is name of days of week} |

C | X = Set of all names of days |

D | All of these |

Question 16 |

The concept about sets was first introduced in the _____ century.

A | 17th |

B | 18th |

C | 19th |

D | 20th |

Question 17 |

Write this in Tabular form: D = { z / z ∈ W ^ z < 5}

A | D = {0, 1, 2, 3, 4, 5} |

B | D = { ......, -2, -1, 0, 1, 2, 3, 4} |

C | D = {0, 1, 2, 3, 4} |

D | D = { ......, -2, -1, 0, 1, 2, 3, 4, 5} |

Question 18 |

Write this in set-builder form: C = { Ravi, Chenab, Indus, Jhelum, Sutlej }

A | C is river of Pakistan |

B | C = { x / x is a river of Pakistan} |

C | C = {x / x ∈ R} |

D | None of these |

Question 19 |

In ____ form of sets, we describe the characteristics of members of a set in any common language.

A | Descriptive |

B | Tabular |

C | Set-builder |

D | None of these |

Question 20 |

Write this in Tabular form: C = Set of integers greater than – 4 and less than 2

A | C = { x / x ∈ Z ^ -4 ≤ x ≤ 2} |

B | C = { x / x ∈ W ^ -4 ≤ x ≤ 2} |

C | C = {-4, -3, -2, -1, 0, 1, 2} |

D | None of these |

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