1. “I like your new house, Ted,” said John. “It’s funny you’ve got the same street number as ours.” “Yes we noticed that,” Ted replied. “But there’s something else. It’s the sum of the squares of the ages of our two kids and also the sum of the squares of your two, and that’s not possible with any lower number.” John thought a moment. “Yes, they’re all four different ages, so you’re right.” What was that number?

House number 65

House number 36

House number 47