If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What Time Should the last watch show in the below figure?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Check out the number list below and find what number comes next in the sequence.

111 , 113 , 117 , 119 , 123 , 137 , ?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Which part of London exists in France as well ?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?