What does this rebus mean?

O
N
C
E
TIME

What is the longest word in the dictionary?

I can write cow in 13 letters.

Can You?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

What number do you get when you multiply all of the numbers on a telephone's number pad?

What does this mathematical rebus means ?

Which tank will fill first?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?

If,

Akriti = 631
Levis = 521
Sroti = 521
Aneel = 533
Then,
Sunil =?