deleted:    112_prime.py
	deleted:    123_mult_table.py
	deleted:    124_numPuzzleI.py
	deleted:    126_NumberPuzzles2.py
	deleted:    127_NumberPuzzles3.py
	deleted:    128_NumberPuzzles4.py
	deleted:    78_distance_formula.py
	deleted:    euler_1.py
	deleted:    euler_2.py