Question 11: An’s present age is a number that is divisible by 7. In five years, An’s age will be divisible by 5. Knowing that An’s sister is now 43 years old. Find An’s age (According to Children’s Newspaper No. 20 .)
Ms. An is 43 years old, ie An must be younger than 43 years old.
But An’s age today is divisible by 7, so it’s possible that An’s age is 7,14,21,28,35,42 today.
On the other hand, in the year of the year An is divisible by 5, ie ending in 0 or 5, seeing that she has the value 14 is satisfied because next year an will be 15 years old.
So now An is 14 years old