My mum was 27 when I was born8 years ago she was twice as old as I shall be in 5 years' timeHow old am I now?

You are currently 8 years old. Since your mum was 27 when you were born, she is now 27 + 8 = 35 years old. In 5 years, you will be 8 + 5 = 13 years old. Eight years ago, she was twice your age then, which confirms that your current age is indeed 8.