Can anyone tell me a word in the English dictionary which has a silent 'z'?

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?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

What brings you down but never up?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Count the number of triangles in the given picture.

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.