James is 19 years old. he is three years older than twice his sister’s age. how

His sister is 8 because twice his sisters age is 8+8=16 and 16+3=19

James is 19. that means take away 3 from 19=16 and half 16 =8. if we do that again. his sister=8×2=16+3

The steps for calculating the prime factors of a number is similar to the process of finding the factors of any number.
Start dividing the number by the smallest prime number i.e., 2, followed by 3, 5, and so on to find the smallest prime factor of the number.
Again, divide the quotient by the smallest prime number