Solution:

Look at the marked lady and look at her feet. She has two left feet.

Solution:

The lady on the far right has the same mark on her upper arm as the two boys, and she also has two ice cream cones.

Solution:

6526884.

To get from 4 to 12, you use the following formula. 12 = (4 squared)/2 + 4.
Continue on with (X^2)/2 + X.

Solution:

No time at all it is already built

Solution:

Stand up and be counted

Solution:

Back To Square one

Solution:

HighJacking (High+Jack+King)

Solution:

SQRT(.2 ^ -2)

Take .2 and raise it to the power of -2 and then take the square root.

Solution:

Each word has 3 consecutive letters of the alphabet-
couGHIng (GHI)
thiRSTy (RST)
DEFiant (DEF)

Solution:

BACK

All the others can also be read backwards as proper words.