A little math lesson

Just in case you've all forgotten most of your math knowledge, I'm here to remind you of the basics. Two people celebrate their 60th birthdays, how many years old are they combined? You might have guessed the answer by now (spoiler above). The party invitation had something related to this number, some point or joke or story, but I haven't seen it myself and have forgotten what it was all about... Oh well. I like the card anyway, the colours are fresh and spring-y, but not too neon bright. It came together surprisingly easy with materials I had lying around from a previous, unsuccessful, attempt. Love it when that happens. And lastly, if you'd like to add some mathemagic to your day, I highly recommend the always amazing ViHart! :)