Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

What does this rebus means ?

PROG WORKRESS

What is the word or phrase?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

I have a sore throat and a severe headache. I have four tablets with me that are identical to each other and they do not have any cover on them. There is no way I can identify which tablet serves what purpose. The only thing that I know is that two of these four tablets are for the throat and the remaining two are for the headache. To treat my condition, I must take 1 of each. What will I do now?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?