Solution:

Parents.

Solution:

mother

We know from (3) that the youngest person was not the victim, from (4) that the youngest person was not the helper and from (6) that the youngest person was not the killer. The youngest person can only have been the witness therefore. If we make up a chart there are now three possible combinations:

Oldest person (father) H H M

Next to oldest (mother) V M H

Next to youngest (son) M V V

Youngest (daughter) W W W

(H = Helper ; V = Victim ; M = Murderer ; W = Witness)

We can work out from (5) that the father was the oldest, from (2) that the youngest person must have been the daughter. Therefore the next to the youngest must have been the son and the next to the oldest, the mother.

Solution:

The Password.

Explanation:
Clues 2 and 5 are correct and rest are lies.

Solution:

For this answer is 3^0, 3^1, 3^2... That is 1,3,9,27,81,243 and 729.

Solution:

There are 3 fruits (1 grapes, 1 apples, and 1 oranges).

Solution:

Flyball should pay Lavy $11 instead of accepting his counter offer as in that case the club will end up paying almost double the amount.

Solution:

If you see the picture, they formed a pentagonal shape and achieved the required.

Solution:

It can surely be true because it is not mentioned that it was raining.

Solution:

Michelangelo juggles the diamonds across while crossing the bridge.

Solution:

Pages 19, 20, 23, 37, 38, & 42 will also be missing

Solution:

2 degree below zero