One phone, passed around. The Genius answers a silly number question honestly and in secret. Everyone else says their guess out loud. Closest guess gets the point.
Add your own number questions. They stay saved on this phone for next time.
These got reshuffled 3 or more times. Remove them, reword them, or keep them as they are.
Write a question with a number answer, then pass the phone. Make it something people have opinions about.
You're the Genius this round.
Read the question out loud. Then type your honest answer where nobody can see it.
Go around and ask everyone for their guess. Then reveal your number.
Tied? Tap everyone who tied and they'll split the point.