I’m tall when I’m young, and I’m short when I’m old. What am I?

The centre of the third figure is empty. What digit should fit inside?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

There is something which you can be arrested for attempting but not for successfully completing.

Can you count the number of triangles in the given figure?

Through your logical capabilities, can you make 7 an even?