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Prime and Composite Numbers - 6

Description: Prime and Composite Numbers - 6
Number of Questions: 25
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Tags: Prime and Composite Numbers - 6 Prime Numbers and Composite Numbers Prime numbers Analogy Verbal Reasoning
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How many prime numbers are there between 600 and 620?

  1. 5

  2. 6

  3. 7

  4. 8


Correct Option: A
Explanation:

There are 5 prime numbers (601, 607, 613, 617, 619) between 600 and 620. 

How many prime numbers are there between 150 and 170?

  1. 4

  2. 5

  3. 6

  4. 7


Correct Option: A
Explanation:

There are 4 prime numbers (151, 157, 163, 167) between 150 and 170,  

What will be the sum of all prime numbers between 50 and 60?

  1. 105

  2. 108

  3. 110

  4. 112


Correct Option: D
Explanation:

Prime numbers between 50 and 60 are 53 and 59. Sum = 53 + 59 = 112

Which of the following is a prime number?

  1. 1162

  2. 1247

  3. 1433

  4. 1618


Correct Option: C
Explanation:

1433 is a prime number because it has only two factors, i.e. 1 and 1433.

Which of the following is a prime number?

  1. 1239

  2. 1227

  3. 1979

  4. 2052


Correct Option: C
Explanation:

1979 is a prime number because it has only two factors, i.e. 1 and 1979 (number itself).

How many prime numbers are there between 70 and 80?

  1. 2

  2. 3

  3. 5

  4. 7


Correct Option: B
Explanation:

There are 3 prime numbers (71, 73, 79) between 70 and 80. 

Which of the following is not a prime number?

  1. 967

  2. 983

  3. 987

  4. 991


Correct Option: C
Explanation:

987 is not a prime number because it has more than two factors.

How many prime numbers are there between 120 and 150?

  1. 2

  2. 3

  3. 4

  4. 5


Correct Option: D
Explanation:

There are 5 prime numbers (127, 131, 137, 139, 149) between 120 and 150. 

Which of the following is not a prime number?

  1. 1051

  2. 1279

  3. 1327

  4. 1488


Correct Option: D
Explanation:

1488 is not a prime number because it has more than two factors.

Which of the following is not a prime number?

  1. 829

  2. 985

  3. 1321

  4. 1627


Correct Option: B
Explanation:

985 is not a prime number because it has more than two factors.

Which of the following is a prime number?

  1. 883

  2. 907

  3. 919

  4. All of these


Correct Option: D
Explanation:

All the given numbers are prime because they have only two factors.

23 is a _____.

  1. prime number

  2. composite number

  3. negative number

  4. surd


Correct Option: A
Explanation:

23 is a prime number as it has only 2 factors, i.e. 1 and 23 itself.

Which prime number is the predecessor of 47?

  1. 41

  2. 42

  3. 43

  4. 47


Correct Option: C
Explanation:

43 is the prime number that precedes 47.

Which of the following is a prime number?

  1. 14

  2. 15

  3. 16

  4. 17


Correct Option: D
Explanation:

17 is a prime number because it has only 2 factors, i.e. 1 and 17 (number itself).

Which of the following is a prime number?

  1. 351

  2. 352

  3. 353

  4. 357


Correct Option: C
Explanation:

353 is a prime number because it has only 2 factors, i.e. 1 and 353 (number itself).

Which of the following prime numbers is the successor of 67?

  1. 61

  2. 71

  3. 73

  4. 79


Correct Option: B
Explanation:

The next prime number after 67 is 71.

Which of the following factors of 176 is a prime number?

  1. 4

  2. 8

  3. 11

  4. 16


Correct Option: C
Explanation:

Prime factors of 176 are: 2 × 2 × 2 × 2 × 11 So, out of the given options, 11 is the required prime number.

Which of the following is the only even prime number?

  1. 2

  2. 3

  3. 5

  4. 8


Correct Option: A
Explanation:

The number, which is both a prime and an even number, is 2.

Which of the following statements is true?

  1. A prime number can be a negative number.

  2. A prime number has more than 2 factors.

  3. A prime number has two factors, the number itself and any other odd number.

  4. A prime number has two factors, the number itself and 1.


Correct Option: D
Explanation:

The true statement is that a prime number has only 2 factors, i.e. 1 and the number itself.

Which of the following numbers with '1' at its units place is a prime number?

  1. 111

  2. 121

  3. 131

  4. 141


Correct Option: C
Explanation:

131 is a prime number because it has only 2 factors, i.e. 1 and 131 (number itself).

The numbers ending in which of the following digits can be prime numbers?

  1. 1, 3, 5, 7

  2. 1, 3, 5, 9

  3. 1, 3, 7, 9

  4. 1, 5, 7, 9


Correct Option: C
Explanation:

The numbers ending in 1, 3, 7, 9 can be prime numbers.

The product of two odd prime numbers is always ______.

  1. odd

  2. even

  3. can be both even and odd

  4. either odd or even


Correct Option: A
Explanation:

The product will always be an odd number, e.g. 5 × 3 = 15, 3 × 7 = 21, 7 × 11 = 77 etc.

Which prime number is the predecessor of 113?

  1. 106

  2. 107

  3. 109

  4. 113


Correct Option: C
Explanation:

The predecessor prime number of 113 is 109.

Which of the following prime numbers is the successor of 211?

  1. 211

  2. 223

  3. 227

  4. 229


Correct Option: B
Explanation:

The successor prime number of 211 is 223.

How many prime numbers are there that end in 5?

  1. 1

  2. 2

  3. 3

  4. 4


Correct Option: A
Explanation:

There is only one such prime number, i.e. 5 itself.

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