Brain Teaser Puzzles

Cryptograms:
1.Cryptogram #1 (warmup)
2.Cryptogram #2 (another warmup)
3.Cryptogram #3 (tougher)
4.Cryptogram #4 (final one)

Math Square Puzzles:
1.Math Square Puzzle #1 (figure out the numbers)
(more may yet come ...)

Tile PuzzlesL
1.Math Square Puzzle #1 (re-arrange the tiles)
(more may yet come ...)