“Your mom made five palačinke (crêpe in Serbian), your brother ate two; how many are left for you?” For some reason, this “sweet” math got etched in my mind as one of my earliest memories. It was my dad, playing number games with me. And many others: card games, puzzles, word riddles, brainteasers, anything where you had to figure out things, he loved. Then of course, so did I.