How can you take 2 from 5 and leave 4?

Find the hidden panda in the image below.

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

I have Rs.50 and I spend it in the way as below.

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Solve the maths equation in the picture below by placing the numbers 1 through 9 into the boxes so that all the 3 equations are correct.

Buy me, smell me or deliver me, I do not change.

Who am I?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?