What number should come in place of the question mark below?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

Can you fill the blank with the correct number?

6 30 870 756030 _____

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.