Kevin is 4 times as old as Daniel and is also 6 years older than Daniel. How old is Kevin?

There are numerous important information's already given in the question. Based on these information's, the answer can be deduced.

Let us assume the age of Daniel = x years

Let us assume the age of Kevin = y years

Then

y = 4x

and

y = x + 6

So

4x = x + 6

4x - x = 6

3x = 6

x = 6/3

= 2 years

So

Age of Kevin = 4 * 2 years

= 8 years