IF IT TAKES A MA RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

Mary has four daughters. Let x be the daughter.
Four daughters mean - x + x + x + x
Each of her daughters has one brother - let y be the son.
Total children => x + x + x + x + y. => 5
She has Total 5 children, all of her daughters have the same 1 brother. Did you answer this riddle correctly?
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The teacher told her not to use tables!) Did you answer this riddle correctly?
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The answer is 3

If you got a different number you did the math wrong Did you answer this riddle correctly?
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Adders! Did you answer this riddle correctly?
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Jasmine Did you answer this riddle correctly?
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Fake/ counterfeit money Did you answer this riddle correctly?
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The third equation has a term with a pair of whistles. The last line involves a single whistle.

Furthermore, the man in the second and third lines are wearing a whistle, but the man in the last line is not wearing a whistle. Presumably the value of the whistle should be accounted for to get the correct answer.

The pictures can be translated into the following equations:

shoes + shoes + shoes = 30
shoes + (man + whistle) + (man + whistle) = 20
(man + whistle) + 2(whistles) + 2(whistles) = 13
shoes + (man) x (whistle) = ?

From the first equation we can solve for the shoes value:

shoes + shoes + shoes = 30
3(shoes) = 30
shoes = 10

We can then solve the second equation for the (man + whistle) value:

shoes + (man + whistle) + (man + whistle) = 20
10 + 2(man + whistle) = 20
2(man + whistle) = 10
man + whistle = 5

Then we solve the third equation for the whistle:

(man + whistle) + 2(whistles) + 2(whistles) = 13
5 + 4(whistles) = 13
4(whistles) = 8
whistle = 2

We also need to solve for the value of the man:

man + whistle = 5
man + 2 = 5
man = 3

Now we can evaluate the final expression, remembering the order of operations that multiplication should be evaluated before addition:

shoes + (man) x (whistle) = ?

10 + 3 x 2
= 10 + 3 x 2
= 10 + 6
= 16 Did you answer this riddle correctly?
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The man will break each of the 4 pills in half and eat 1 half from each of the pills. Did you answer this riddle correctly?
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A Preacher. Did you answer this riddle correctly?
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3 minutes. She puts two pieces in the toaster, toasting one side of each. Then she flips one of them, takes one out, and puts the completely untoasted piece into the toaster. Finally, she takes out the toasted piece and puts the two half-toasted pieces of bread into the toaster for a minute and she's done. Did you answer this riddle correctly?
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A fist. Did you answer this riddle correctly?
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A priest. Did you answer this riddle correctly?
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A snowman. Did you answer this riddle correctly?
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A Train. Did you answer this riddle correctly?
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Newspaper delivery man was the murderer because of absence of Wednesday and Thursday missing newspaper.

This indicates he already know that there is no one to read it. Did you answer this riddle correctly?
YES  NO