Meet your Maths Teacher

If my marks in maths are less than your markes in Maths by 20% then your marks in Maths are 25% more than my marks in Maths. (True/False)

The advantage of the organisation of parent -teacher meetings is

There are 12 teachers in a school who can teach Maths or Physics. Out of these, 6 teach Maths and 4 teach Physics and Maths both. Find how many teachers teach Physics ?

What should be the role of teacher in meeting the individual differences?