It takes resilience, perspective, and – perhaps most importantly – a very good sense of humour. After a century of life lessons, most people who reach the triple-digit milestone have earned the right to laugh at ageing, memory lapses and all the birthday candles they can no longer count. These five jokes celebrate turning 100 with warmth, wit and a healthy dose of self-awareness, proving that laughter really is one of the best ways to mark a very long life. You know you’re 100 when your back goes out more than you do. Whenever we had a fight, the one who was proved wrong would go outside and take a walk.”You know you’re 100 when your candles cost more than the cake.