10+10=20 11+11=22.
Explanation: This joke plays on the sound of the answers rather than their mathematical value. When you say “10+10 equals 20” and “11+11 equals 22,” the second answer sounds like “twenty too,” as in “twenty also.” This creates a clever wordplay, suggesting that both 10+10 and 11+11 result in “twenty” in a playful and unexpected way.