As Dexter Kruger celebrates his 110th birthday, he wants to make it clear that he is still sharp as a tack.

Kruger is also well aware that everyone wants to know his secrets to living to such an old age.

“I knew you were going to bring that up because everyone does,” he said to the Courier Mail.

“Always eat when you are hungry, always drink when you are dry, always sleep when you are sleepy, don’t stop breathing or you’ll die,” Mr Kruger said, borrowing from an often-quoted old verse, with a cheeky grin.

However, he realises that it might just be down to good genes.

“I had two cousins who made 100, and then my ­mother’s sister made 103, and I am 110,” he explained.

Kruger was born on January 13th, 1910 in what he describes as a different world.

“You could say that the horse and buggy was still the transport while motor cars were coming on,” he said of his childhood.

“The change (of technology) has been very gradual – it’s hard to realise.”

Kruger appreciates the technology as it helps him indulge in one of his favourite hobbies, which is writing.

“I do find the technology, especially in producing my books, just marvellous,” he said.

As Kruger started writing at the age of 86, he has since published 12 other books and is working hard on his latest one.

“It’s a long way off being published – it is a biography – but I have 12 other books (published),” he said.

He has plenty to keep him busy on his birthday, as he will be surrounded by 50 of his friends and family.

“We only invited about half a dozen people really, but it was sort of an open-ended invitation,” he says.

“It’s going to be quite a day.”