MATH PUZZLE...

 

MATHEMATICS PUZZLE

 1) There are five squares (one 3x3 and four 1x1) formed with 20 matchsticks, as shown in the illustration. Move two matchstick to get seven squares. Overlapping or breaking of matchsticks or "loose ends" are not allowed.

ANSWER:Seven squares are formed: five 1x1 squares, one 2x2 square, and one 3x3 square.

2)
What is unique about 8549176320 ?

It is the digits 0 to 9 in alphabetical order.

Note: it can also be exactly divided by all of the digits 1-9 except 7 (thanks to "The Hermit")

3)

Answer : 35

4)

Answer : 24

5)

ANSWER:14
6)

ANSWER: 22

7)

Answer : 333