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?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

What country can make you shiver?

what's the probability of getting a king or a queen from a pack of 52 cards?

When it is alive we sing, when it is dead we clap our hands. What is it?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.