We've lost something that's been with us for so long, and something that drew a lot of us into mathematics. But perhaps that's always the way with math problems, and we just have to find new ones to capture our attention.

I loved doing problems in school.

The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.

I had this rare privilege of being able to pursue in my adult life, what had been my childhood dream.

The only way I could relax was when I was with my children.

I know it's a rare privilege, but if one can really tackle something in adult life that means that much to you, then it's more rewarding than anything I can imagine.

It's fine to work on any problem, so long as it generates interesting mathematics along the way - even if you don't solve it at the end of the day.