THE MAN WHO INVENTED IT DOESNT NEED IT THE MAN WHO BOUGHT IT DOESNT WANT IT RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

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?
YES  NO  

A Christmas tree Did you answer this riddle correctly?
YES  NO  

The couple is either a man and his daughter or an uncle and his niece. Did you answer this riddle correctly?
YES  NO  

Sands in an hourglass. Did you answer this riddle correctly?
YES  NO  

It was way past its threadtime! Did you answer this riddle correctly?
YES  NO  

Heart Did you answer this riddle correctly?
YES  NO  

The wise son bought a candle and a box of matches. After lighting the candle, the light filled the entire room. Did you answer this riddle correctly?
YES  NO  

All I Want For Christmas Is My Two Front Teeth Did you answer this riddle correctly?
YES  NO  

A living room. Did you answer this riddle correctly?
YES  NO  

You earned $500 $100 = $400. Did you answer this riddle correctly?
YES  NO  

They built it at the North Pole. Did you answer this riddle correctly?
YES  NO  

Nothing. She divorced him for never being at home. Did you answer this riddle correctly?
YES  NO  

A phone. Did you answer this riddle correctly?
YES  NO  

The silver box contained Anna's picture. If her picture had been in the gold box, two statements would have been true. (The messages on both the gold box and the silver box.) If her picture had been in the bronze box, two statements would have been true. (The messages on the bronze box and the silver box.) Did you answer this riddle correctly?
YES  NO  

The mule. A gold bar 5 inches in diameter and 5 inches in height would have weighed far too much for either of the sons to carry, only the mule could have. Did you answer this riddle correctly?
YES  NO