Answer:
9
Step-by-step explanation:
9 is the only number that has a whole number square root, 3.
You work it backwards.
-- If there were 4 children and each child got 4 pieces,
then the children got (4 x 4) = 16 pieces altogether.
-- That's what was left after he took 2 pieces for himself.
So he started with (16 + 2) = <em>18 pieces</em>.
Answer:
drone is 60km/h bird 40km/h
Step-by-step explanation: