What is so fragile that saying its name breaks it?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

Which English verb becomes past tense just by rearranging the letters?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

What can you see in the middle of March and April that you can never see in any other month?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

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

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?