Detective IQ challenge
Que. 76
How many Handshakes
are there
when 5 people
shake hands
with each other?
- 15
- 25
- 10
- 5 10
Let's count the handshakes step by step:
1. A shakes hands with B, C, D, and E → (4 handshakes)
2. B has already shaken hands with A, so now shakes hands with C, D, and E → (3 more handshakes)
3. C has already shaken hands with A and B, so now shakes hands with D and E → (2 more handshakes)
4. D has already shaken hands with A, B, and C, so now shakes hands with E → (1 more handshake)
5. E has already shaken hands with everyone, so no new handshakes.
Now, let's add them up:
4 + 3 + 2 + 1 = 10 handshakes!
So, the answer is 10 handshakes. 🎉🤝