What is so fragile that saying its name breaks it?

Spot 5 differences in two Christmas tree below:

Can you find the next number in the sequence?

113 119 101 114 116 ?

I look at you, you look at me, I raise my right, you raise your left. What am I?

What does this say?

XLR8

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

Optical Illusion: People with hawk eyes can spot a different car in 5 seconds. Can you? Test your vision now!

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

A landlord calls both of his sons and tells them that their horses will now decide who will transfer the inheritance. He tells them to race along the land till the end and the one whose horse will be slower will win and be the heir to all the property.

Both of them keep wandering for days but to no result. Then they ask a wise man regarding it. The man advises them on the matter after which they jump on the horses and race as fast as they can till the end. Why did they do it?

What did the wise man say?