What does this rebus means ?

PROG WORKRESS

2, 3, 5, 9, 17, _ What is the next number in the sequence?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Which tank will fill first?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

Can you start the fire using two pieces of wood?

By moving just one matchstick, you need to make the below statement true. Can you do it?

Can you Find and name the hidden bird in the picture below ?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?