Pet store

They sold fish from one aquarium from the breeding product (Zverimex). Ondrej wanted half of all the fish, but to avoid cutting any fish, he got half the fish more than he wanted. Matej wanted half of the remaining fish, but like Ondrej, he got half the fish more than he demanded. In the end, Petrik wanted half the remaining fish, but he also got half the fish more than he wanted. Then, the aquarium was fishless. How many fish were initially in the aquarium? How many did each boy get?

Correct answer:

x =  7
O =  4
M =  2
P =  1

Step-by-step explanation:

$x=2^3-1=7$

$O=x/2+0.5=7/2+0.5=4$

$M=(x-O)/2+0.5=(7-4)/2+0.5=2$

$P=(x-M-O)/2+0.5=(7-2-4)/2+0.5=1$

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