



 
Think about what you get by doing one operation. You can get any of these puzzles: 7 4 3 1 = 10  that is, (5+2) 4 3 1 and ten more. Maybe you can see a solution to some of those simpler puzzles.. For instance, the second one could give 3 + 4 + (3x1) = 10. That would give a solution to the original puzzle of (52) + 4 + (3x1) = 10. You do not really need the parentheses on that one  sometimes you will. There are lots more solutions  see how many you can find. Hint: you can always "lose" the 1 by multiplying, dividing, or exponentiating. Bonus points (in my rating) for nontrivial use of exponents, or of division with a noninteger result! Good Hunting!  


Math Central is supported by the University of Regina and the Imperial Oil Foundation. 