All levels – Equations practice

Hey, I have some new problems for you guys to try out.

1) Elementary – ! 90×96 5 cubes

2) Middle – nof, pob, 92*53, 3 cubes.  Easy version using a root, hard version without.

3) Junior – k7 (5*63)/7  Bonus question: Why is the answer different from (2*63)/7?

 

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