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

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

What goes up but never comes down?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

What is the last thing you take off before bed?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Can you identify the hidden rebus in the image below?

Solve this riddle by finding the odd one out from the rest.