Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Which English verb becomes past tense just by rearranging the letters?

Why is it very easy to weigh a fish?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

I have branches, but no fruit, trunk or leaves. What am I?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

If eleven plus two equals one, what does nine plus five equal?

By what process could you make a 'Tea-Table' into food?