If 1+9+8=1, what is 2+8+9?

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?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Two friends Smith and Andrew were talking about the bravery of their families. Smith told great stories about his courageous grandfather who fought for Britain in "World War I". Andrew told that his grandfather was so brave that in 1919 just after the war he was honoured with a bravery medal with the words "For our Courageous Soldiers In World War I" embedded into it. Smith knows that his friend is lying. How?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

Through your logical capabilities, can you make 7 an even?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

Why is a river so rich ?

I can be cracked, made, told, and played. What am I?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?