FREE HINTS about VOLUME puzzles:

LOCK #1:  Color Lock

• HINT:  Volume is the amount of space an object takes up.  How much space do the colored objects make up? (There are 2 BLUE objects).

LOCK #2:  NUMBER LOCK

• HINT:  mm < cm < inches < feet

LOCK #3: DIRECTIONAL LOCK

• Doubling volume means TWICE AS MANY cubes.  Start with one, then double it. Then double it again. Then double it again!

LOCK #4: NUMBER LOCK

• "1D, 2D, 3D, more? Length, Area, and Volume in store!"   How many 1D figures are there?  2D?  3D?

LOCK #5: COLOR LOCK

• Units for AREA is squared and VOLUME is cubed, but LENGTH is just units.

• Find the color with the units that DO NOT belong!