Applying Twin Primes In Problems

1) Which of these numbers is part of a twin prime pair?

15

19

21

25

A twin prime pair consists of two prime numbers that have a difference of two. In this case, 19 is prime and its twin prime is 17, making it part of a twin prime pair. The other numbers listed (15, 21, 25) are not prime.

Explanation

A twin prime pair consists of two prime numbers that have a difference of two. In this case, 19 is prime and its twin prime is 17, making it part of a twin prime pair. The other numbers listed (15, 21, 25) are not prime.

2) What is the twin prime pair of 29?

27 and 29

33 and 31

29 and 31

29 and 33

Both are primes differing by 2.

Explanation

Both are primes differing by 2.

3) Which twin prime pair is under 15?

11 and 13

13 and 15

15 and 17

17 and 19

This is the only valid twin pair under 15.

Explanation

This is the only valid twin pair under 15.

4) What is the sum of twin primes 17 and 19?

34

36

38

40

17 + 19 = 36.

Explanation

17 + 19 = 36.

5) Which is the smallest twin prime pair under 10?

3 and 5

5 and 7

7 and 9

9 and 11

The first twin primes.

Explanation

The first twin primes.

6) Which number is not in a twin prime pair?

5

11

17

23

23 has no twin since 21 and 25 are not prime.

Explanation

23 has no twin since 21 and 25 are not prime.

7) Which twin prime pair is greater than 90?

89 and 91

91 and 93

101 and 103

97 and 99

Both are primes and above 90.

Explanation

Both are primes and above 90.

8) Which number is part of a twin prime pair with 41?

39

42

45

43

41 & 43 form a twin prime pair.

Explanation

41 & 43 form a twin prime pair.

9) Which pair shows twin primes correctly?

71 and 72

71 and 73

72 and 74

74 and 76

Both primes differ by 2.

Explanation

Both primes differ by 2.

10) Which twin prime pair straddles 30?

29 and 31

31 and 33

33 and 35

35 and 37

They are just below and above 30.

Explanation

They are just below and above 30.

11) Which prime has no twin prime partner?

2

3

5

7

2 cannot form a twin prime pair.

Explanation

2 cannot form a twin prime pair.

12) Which twin prime pair is nearest to 60?

61 and 63

63 and 65

59 and 61

61 and 67

They are the twin primes around 60.

Explanation

They are the twin primes around 60.

13) Which is the sum of twin primes 11 and 13?

22

24

26

28

11 + 13 = 24.

Explanation

11 + 13 = 24.

14) Which pair is not twin primes?

29 and 31

41 and 43

47 and 49

59 and 61

49 is not prime.

Explanation

49 is not prime.

15) Which twin prime pair is between 70 and 75?

71 and 73

72 and 74

73 and 75

75 and 77

Only valid twin primes in this range.

Explanation

Only valid twin primes in this range.

16) Which of these primes is in a twin pair?

47

53

79

59

47 pairs with 49 (but since 49 isn’t prime, careful—best choice from list is 59, which pairs with 61). Correct option is D) 59 actually.

Explanation

47 pairs with 49 (but since 49 isn’t prime, careful—best choice from list is 59, which pairs with 61). Correct option is D) 59 actually.

17) Which number is missing in the twin prime pair (41, __)?

38

39

43

35

41 and 43 differ by 2 and are prime.

Explanation

41 and 43 differ by 2 and are prime.

18) Which twin prime set lies between 10 and 20?

9 and 11

10 and 12

13 and 15

17 and 19

Valid twin primes in this range.

Explanation

Valid twin primes in this range.

19) Which prime pair is not twins?

3 and 5

17 and 19

29 and 31

23 and 29

They differ by 6, not 2.

Explanation

They differ by 6, not 2.

20) Which rule describes twin primes best?

They are prime numbers with a difference of 2

They are prime numbers with a difference of 3

They are composite numbers with a difference of 2

They are factors of 100

This is the precise definition of twin primes.

Explanation

This is the precise definition of twin primes.

Applying Twin Primes in Problems

1) Which of these numbers is part of a twin prime pair?

2) What is the twin prime pair of 29?

3) Which twin prime pair is under 15?

4) What is the sum of twin primes 17 and 19?

5) Which is the smallest twin prime pair under 10?

6) Which number is not in a twin prime pair?

7) Which twin prime pair is greater than 90?

8) Which number is part of a twin prime pair with 41?

9) Which pair shows twin primes correctly?

10) Which twin prime pair straddles 30?

11) Which prime has no twin prime partner?

12) Which twin prime pair is nearest to 60?

13) Which is the sum of twin primes 11 and 13?

14) Which pair is not twin primes?

15) Which twin prime pair is between 70 and 75?

16) Which of these primes is in a twin pair?

17) Which number is missing in the twin prime pair (41, __)?

18) Which twin prime set lies between 10 and 20?

19) Which prime pair is not twins?

20) Which rule describes twin primes best?