What has many keys but can’t open a single lock?

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

Make a sentence consisting of three words that have the whole alphabet.

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

When 99 is considered higher than 100?

What is the difference between a jeweller and a jailer?

Replace the question mark with the correct number in the below-given picture?

John was born on March 5, 1970, in Delhi, India. Jacob was born 25 days before John. The year when they took birth, Republic Day fell on Monday.

Can you find out on what day was Jacob born?