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Look at the picture, determine the pattern and replace the question mark with a number.
Tricky math! Can you solve this? If 11+11=4 and 12+12=9 Then 13+13=?
MATH PUZZLE: Can you replace the question mark with a number?

Three Mile Island nuclear accident

In 1979, a nuclear accident occured at Unit 2 of the Three Mile Island nuclear power plant outside Harrisburg, Pennsylvania, USA. Caused by human and mechanical errors, a cooling system malfunctioned and permitted a partial meltdown of the reactor's core. Efforts to re-establish cooling of the reactor took several days. No evacuation was ordered, but 100,000 people fled. President Jimmy Carter personallyvisited four days later (1 Apr 1979). Disaster was avoided, although some radioactivity leaked into the air. It was the worst U.S. nuclear accident to date, but no radiation injuries were identified. On 21 Jul 1982, a video camera inspected the damage to the core and revealed a large amount of uranium had spilled and melted to the bottom of the pressure vessel.«

A police officer pulls over th...

A police officer pulls over this guy who's been weaving in and out of the lanes. He goes up to the guy's window and says, "Sir, I need you to blow into this breathalyzer tube."
The man says, "Sorry, officer, I can't do that. I am an asthmatic. If I do that, I'll have a really bad asthma attack."
"Okay, fine. I need you to come down to the station to give a blood sample."
I can't do that either. I am a hemophiliac. If I do that, I'll bleed to death."
"Well, then, we need a urine sample."
"I'm sorry, officer, I can't do that either. I am also a diabetic. If I do that, I'll get really low blood sugar."
"All right, then I need you to come out here and walk this white line."
"I can't do that, officer."
"Why not?"
"Because I'm drunk."
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