Question

word problems
how many pairs of prime numbers are there which can be used to 20 has the sum of two prime numbers ?​

Answer 1

Answer:

The two numbers are 17.5 and 2.5.

Step-by-step explanation:

write five pairs of prime numbers less than 20 whose sum is divisible by 5.

(Hint: 3 + 7 = 10)

Numbers divisible by 5 are

5, 10, 15, 20, 25, 30

(All these are also called multiples of 5)

We need to write these

as sum of 2 prime numbers less than 20

i.e. using 2, 3, 5, 7, 11, 13, 17, 19