Looking for a way to prove who is the smartest in your family?

Challenge them to a Hard Quiz tournament: five rounds, 50 questions.

Who will reign supreme? Click through each round to find out

Round 1: Bubble tea and swollen feet

What are bubble tea balls made of? (Supplied: Evan Collis/GRDC)

Round 2: Carly Simon and avocadoes

Which variety is most widely grown? (Kim Honan)

Round 3: Maggie Smith and bubble wrap

Who does she play in Harry Potter? (AP: Kirsty Wigglesworth)

Round 4: Lorde and dating apps

What did Lorde review on her secret Instagram account? (triple j)

Round 5: Bert and Ernie and Snapchat

What does Bert give to Ernie for Christmas?

Where to find all the ABC's quizzes

Want to test yourself even further?

Take a squiz at the ABC's New Quiz topic page and see if you are a whiz at our previous quizzes.