general Maths Puzzle

If my house number is a multiple of 3, then it is a number from 50 to 59 (inclusive). If my house number is not a multiple of 4, then it is a number from 60 to 69 (inclusive). If my house number is not a multiple of 6, then it is a number from 70 to 79 (inclusive). What is my house number?

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general Other Question

Sam asked Ram how many students there were in his Maths class .Ram replied, 3/4 of them are less than 22 years old, 2/3 are less than 21 years old, 12 are not yet 20 years old, and there are twice as many between the ages of 20& 21 as there are between the ages of 21 & 22. How many students are there in Ram's class? There are 37 students in a classroom. What is the probability that at least 4 of them would have their birthday in the same month?