Math IQ questions

Solve this IF you can.


...(5) ........(91)........... ( ? )
(3) (4) ..(35). (84).. (105) .(360)

Spoiler:

375, pythagoras theorem

654, 666, 675, 711, ? (hint: read this "minus fifteen square")

Spoiler:

1151, the first thing you will do is see the difference of each number's sequence, 12, 9, 36, ?=21, hint says (x-15)^2

100 people are surveyed, 84 like basketball, 67 like swimming, 82 like hiking, 76 like jogging. What is the least probability of people who like all 4 sports.

Spoiler:

9, add them all up and minus out the maximum amount of people who like 3 sports only, 84+67+82+76-(3*100)

802, 1010, 1111, ?

Spoiler:

2222, reverse the entire number and add to it

345 (180042) 167
296 (216160) 258
187 (... ?... ) 349

Spoiler:

056324, (3^2)*4*5 = 180 and (1^2)*6*7 = 042 so 180042

A lady had brought some cookies to work, to her boss she gave half of the cookies she had plus half a cookie. Then to her best friend she gave half of what she had left plus half a cookie. Finally to her colleague beside her desk she gave half of what she had left plus half a cookie and she left half a cookie for herself. How many cookies did she bring to work?

Spoiler:

11, it's not that hard