Each has his own answer to longevity, but it's likely the Mossman triplets have all reached 90 because they're so competitive none wants to be the first to die.
It's fair to say that Tim, Rodney and Henry Mossman are pretty competitive with each other - something which family say comes with the territory for the identical triplets who were three of 11 children growing up.
The trio celebrated their 90th birthday on April 16 and were joined by more than 125 family and friends at a party on Saturday in Rotorua.
Two of the three, Tim and Rodney, live in Rotorua while Henry is based in Auckland.
The family believe they could be the oldest living triplets in the Southern Hemisphere.