I taste better than I can smell. Who am I?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

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?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

What 5-letter word typed in all capital letters can be read the same upside down?

I’m tall when I’m young, and I’m short when I’m old. What am I?

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