IQ Question

Hi everyone,I have 3 IQ question,you want to test?
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IQ Question 1

Got 3 person A,B,C go to a hotel...then the rental is RM10 per person...so they pay RM10 each to the boss...den the boss very kind...give them discount...count them RM25 for 3 person…So he give the change back RM5 to his worker to give them back…But the worker covetousness...so he take out RM2...then give them back RM3 per person…So they get back RM1 per person...so count tats each person just pay RM9...RM9x3=RM27...plus the worker take up RM2...just RM29..where the RM1 gone?
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IQ Question 2

The image be log is a circle area full of grass.
The wood is at the circle area center,that be log the half of a circle is 5m.
Now has a cow in the circle area.
A rope of 5m is bind up at the cow's net.
How to the cow eats outside the circle area's grass?
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IQ Question 3

5 chickens in 5 days can birth 5 eggs.
100 days want how many chickens to birth 100 eggs.
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