What two things can you never eat for breakfast?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

What came first, the chicken or the egg?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

What jumps when it walks and sits when it stands?