the answer is 24
Squares of prime numbers have exactly three factors.
Prime squares
All prime squares have exactly three factors.49 has exactly three factors: 1, 7, and 49.
The squares of all prime numbers have exactly 3 factors. The numbers under fifty that are the squares of primes are 4 (1, 2, and 4), 9 (1, 3, and 9), 25 (1, 5, and 25), and 49 ( 1, 7, and 49).
All prime squares have just three factors. Example: 9, 25
A square has 4 sides therefore 3 squares from 12 toothpicks will simply be three unconnected squares
7 squares is forty nine so you remove two toothpicks to make the digits 49
You make 3-D! Look... 6 squares in one cube and you can do that with toothpicks too!
You arrange 12 toothpicks into a large square, subdivided into four squares : 2 toothpicks on each side and four more, one each from the middle of the sides to the center of the large square. Now you have four (small) squares. Take away 2 adjacent toothpicks from the ones in the center, and you have 2 squares : one remaining small one and the large one that has the small one inside it. (see related link)
move
Make a two by two grid with six toothpicks, and then place the other two toothpicks at a 45 degree angle on the corner of two of the squares.
Remove one of the outer toothpicks and one of the dividers of two squares. there you have two SQUARES .
no
i
bend 2 toothpicks at 90 degree angles and put them cornor to cornor
Divde
make a circle