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

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

In the four images below, can you find the odd one out?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Find the next number in the sequence

1, 2, 6, 21, 88, __?