Can you think of any three-dimensional shape that comprises of exactly two surfaces?

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?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

What do you get if you add 2 to 100 four times?

Can you solve this picture maths equation?

Out of four images which one is the odd one out?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

I know a nine-letter word having only one vowel.
Do you ?