Math puzzle: A sequence of odd events

From left: Snezhana Kudryavtseva/iStock/Getty Images Plus; Cavan Images/Cavan/Getty Images Plus; Tatiana Sviridova/Moment/Getty Images Plus

In Spring 2025, we — Lilly Fang, Lester Mackey and our two children — noticed that something odd was happening to our family. First, Noah turned the odd age of 9 in May. Then Isaiah turned odd — or, more specifically, 7 — in August. Next, Lilly turned odd, 41, in November and finally, Lester turned odd, also 41, in February.