Number 3 i would say i think it is
        
             
        
        
        
Answer:
50 
Step-by-step explanation:
150-100 = 50
 
        
             
        
        
        
Answer: The answer is 81
Step-by-step explanation:
because 9x9=81 so u don't multiply the whole square like this
9x9x9x9=36 thats wrong and that was my mistake but yeah it would be 81.
 
        
             
        
        
        
278. I got It By Counting The Letters On Meh Keyboard As Many Times As The #'s On My Keyboard.