I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

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

Replace the question mark with the correct number below.

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

How can you take 2 from 5 and leave 4?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

how come the second man dies?

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?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

Can you find out the remainder when 3^300 is divided by 5?