Find the next number in the series below

21 32 54 87 131 ?

In an office's desk, you find a unique method that shows the current day of the month. Two numbered cubes are used to depict the current date.

Can you find out the numbers on both the cubes so that each date can be mentioned using them?

Please note that you have to use both the cubes to display any date. Thus the 1st day must be represented by 01 and so on.

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Can you count the number of triangles in the picture below?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Find the missing letter in the last circle logically in the given below picture.

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

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?