Question

Question:2) Two consecutive numbers
from 10 to 25 which are semi-prime
A)
20 and 21
B)
14 and 15
C)
15 and 16
D)
22 and 23​

Answer 1

Answer:

B) is the answer as 14 = 2 ×  7 and 15 = 3 × 5 which are all prime numbers.

Hope this helps :-)

Answer 2

Option A) and Option B) is the correct answer.

To Find:

Two consecutive numbers that are semi-prime.

Solution:

A semi-prime is a number that is exact multiple of only two prime numbers.

A)

20 = 2×2×5

21= 3×7

Here both 20 and 21 are products of only two prime numbers. Therefore they are semi-prime numbers.

B) 14= 2×7

15 = 3× 5

Here both 14 and 15 are products of only two prime numbers. Therefore they are semi-prime numbers.

C) 15=3×4

16 = 2×2×2×2

Here, 16 is a product of only one prime number. Hence, it is not a semi-prime number.

D) 22 = 2×11

23= 23×1

Here, 23 is a multiple of 1 and itself. Hence it is not a semi-prime number.

Therefore, Option A) and Option B) is the correct answer.

#SPJ2

Learn More:

1) Find the smallest semi prime numbers​

Link:https://brainly.in/question/21711493

2)Two numbers are said to be co-prime if their HCF is 1. Match the Pair of numbers given

Link:https://brainly.in/question/30511468