Remaining 8355

Grandma baked 40 cakes. Jurko ate the eighth, Katka the fifth, and Janko the remaining half. How many cakes did Grandma have left?

Correct answer:

z =  14

Step-by-step explanation:

z1=40 z2=z1z1/8=4040/8=35 z3=z2z2/5=3535/5=28 z4=z3z3/2=2828/2=14  z=z4=14

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