Dinner time is the perfect time for conversations and the perfect time to engage with your children. The idea of dinner time maths is to add a small spark of maths to the conversation. Discuss a mathematical idea as a family or solve a problem together.

This evening try a maths riddle or two at the dinner table. Here are a couple of riddles (and the answers) for you to try.

Riddle 1: The ages of a father and his son add up to 66. The father’s age is the son’s age in reverse. How old could they be?


Riddle 2: What weighs more, a kilo of rocks or a kilo of feathers?


Riddle 3: Using only addition, how can you add eight 8’s to get the number 1000?


Answer 1: There are three possible answers; the father could be 51 and the son 15 years old, the father could be 42 with the son 24 years old or the father could be 60 with his son 06 years old.

Answer 2: They would both weigh the same because a kilo weighs a kilo, regardless of the object.

Answer 3: 888  + 88 + 8 + 8 + 8 = 1000


You don’t have to be a math wizard to have these chats, why not give it a try?


Our inspiration for Dinner Time Maths comes from Laura Bilodeau Overdeck who is the brainchild of Bedtime Math, a brilliant blog dedicated to providing you with ideas to incorporate a maths problem into every day.

Photo credit: davidsilver / Foter.com / CC BY-NC-SA