Out of 8 given points, 3 are collinear. How many different straight lines can be drawn by joining any two points from those 8 points?
How many odd numbers of six significant digits can be formed with the digits 0, 1, 2, 5, 6, 7 when no digit is repeated?
The number of ways four boys can be seated around a round table in four chairs of different colours is
A polygon has 44 diagonals. The number of the sides is