Why Aeroplane windows are round?

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 _

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

How do you go from 98 to 720 using just one letter?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Can you guess the name of the month by looking the below rebus ?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?