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?

10+10 and 11+11 can give you the same answer.

Explain how?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

Can you replace the question mark with the correct number in the below table sequence?

I have Rs.50 and I spend it in the way as below.

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

What jumps when it walks and sits when it stands?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?