BrainBashers - Random Puzzles

Puzzle 17

How should these words actually be spelled, without using a dictionary.
bizz-ness
com-it-ee
sin-seer-lee
ark-ee-ollow-jist

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Puzzle 18

Place all of the digits from 1 to 9 into the circles so that the sum of the numbers in each straight line is the same.

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Puzzle 19

A farmer buys chicken feed for 47c per tonne, pig feed for $1.23 per tonne and cattle feed for $1.44 per tonne. The feed can only be purchased by the tonne, and part tonnes aren't sold.

How much of each would they have if they bought 100 tonnes for $100?

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Puzzle 20

Can you complete these common 5-letter words?
-s-g- --r-f -zu-- e--x- -p--c --ln- -w--m ---jo q---a -v-k- i--h- -b-y- --dt-

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