# The Real Thing

I stumbled across the above puzzle the other day. What is the number underneath the car?

Don’t worry if you don’t get it – you won’t be alone.  I had the problem up on the board as a starter for my Upper Sixth A-Level class. The lad who is on course to get an A* – he couldn’t work it out.

And lo and behold, a couple of days into the hols I came across a the real thing – an actual example of the above problem.

Here’s a pic. The question is, what is the number of the parking bay that the car on the left is parked in?

1. Rob Bath
Posted 02/04/2015 at 10:26 pm | Permalink

87

• A Maths Teacher
Posted 03/04/2015 at 8:30 am | Permalink

Well done Rob – you are correct!

Can you explain why?

• By And so it begins.. | trivialfactor on 12/04/2015 at 11:43 pm

[…] SPOILERS: The missing number is 87 🙂 I was at it for a good 10 minutes before my brother rather coyly snatched his phone and flipped the picture upside down. It’s easy now isn’t it! I really liked the problem as it made me think outside the box. And hopefully it’ll do the same for students during a starter activity when I go back to school. I’m not the only teacher who liked it either! After showing people on the #mathsTLP my attention was directed to this blog. […]