Riddle Solutions - Winners and Prizes

#1 Graphite (pencil)

(winner @justtryme90)

#2 The torque required to hold up the longer piece is responsible for the fact that the shorter piece will weigh more. This is the reason why a heavier kid sits closer to the center on a see-saw to balance against a lighter kid.

(winners @sulev and @broer)

#3. X = L8 (87 Rotated 180 deg)

Rotated 180 deg the numbers read as 91, 90, 89, 88, 87, 86

(winner @broer [even though L8 was the answer, his was closest])