Question

mark the following on the number line :1/2

Answer 1

Take a line of appropriate length.  Mark the centre of the line as 0 and divide it into equal distances of 0-1-2-3-4-5 to n, if necessary, mark the negative integers also. (Note: how much units/numbers required=n). Now, in the middle of 1 and 2 mark the half as 1/2.