# Can You Solve Isaac Newton's Tree Puzzle?

This week’s puzzle is not about gravity, though you’d be excused for suspecting as much. After all, when most people read “Isaac Newton” and “tree” in the same sentence, they think also of falling apples. But this week’s puzzle, which is widely attributed to Newton, is actually an exercise in orderly arboriculture.

# Can You Figure Out How To Survive This Week's Puzzle?

This week’s puzzle puts you at the mercy of an unjust torturer. Explaining why he is unjust can help you make sense of a daunting mathematical proof that last year made headlines for being “bigger than Wikipedia.”

# You'll Have To Think Like A Pirate To Solve This Week's Puzzle

Pirates, of course, are notoriously greedy – but they're also incredibly shrewd. And don't forget, they'll kill you, if given the chance.

# This Math Equation Is Also A Limerick

This week's Sunday Puzzle looks like a mathematical equation. Well, it is a mathematical equation. But hidden in that equation is a poem. Can you recite it back to us?

# Think You Know The Solution To This Classic Riddle? Think Again.

Today's puzzle will be posed in two halves. The first half is a classic riddle – in fact, I suspect many of you will have heard it before. The second half, however, is an extension of the riddle that reveals its most common solution be be insufficient.

# Here's How Rare Hearthstone Cards Actually Are

When someone buys \$50 (or more) worth of Hearthstone cards, they inevitably do some simple math to figure out each card's rarity. But those numbers aren't actually useful for figuring out your chances of getting a legendary or golden card next time.