What month of the year has 28 days?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

What kind of band never plays music?

What brings you down but never up?

Birbal was jester, counsellor, and fool to the great Moghul emperor, Akbar.
The villagers loved to talk of Birbal's wisdom and cleverness,
and the emperor loved to try to outsmart him.
One day Akbar (emperor) drew a line across the floor.
"Birbal," he ordered, "you must make this line shorter, but you cannot erase any bit of it."
Everyone present thought the emperor had finally outsmarted Birbal.
It was clearly an impossible task.
Yet within moments the emperor and everyone else present had to agree that Birbal had made the line shorter without erasing any of it.
How could this be?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

What makes this number unique: 8,549,176,320?

What goes up but never comes down?