Have everyone in your group pair up and face each other. Each person holds up 0 to 10 fingers behind their back. On the count of three, have them pull their hands from behind their backs. The first person to yell out the correct sum of all the fingers...
Articles with the Tag sums
Mindbender: Missing money
Three brothers shopping for a TV walk past a shop and see a TV on sale for £30!. ‘Bargain’ they think only £10 each as they always share the cost equally. So in they go to buy the TV. When they get to the assistant to purchase the TV....