What does below pictogram mean?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

What is the last thing you take off before bed?

If eleven plus two equals one, what does nine plus five equal?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

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

Find the next number in the series below

21 32 54 87 131 ?

In the given picture, in how many ways can you read the word "Tiger"?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

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?