Which alphabet is a part of our body?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

How many times can you subtract the number two from the number fifty?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

When is the top of a mountain similar to a savings account?

An inspection by the superintendent of St. Joseph School was scheduled on the next day. The class teacher Jenifer knew that he would be asking questions from her class and she would have to choose a pupil to answer. To offer a perfect impression over him, the teacher explained certain instructions to the students to maximise the chances of getting correct answer every time.

What did she say to the students?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?