If 1+9+8=1, what is 2+8+9?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

When can we add 2 to 11 and get 1 as the correct answer?

What 5-letter word typed in all capital letters can be read the same upside down?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

What does below rebus means ?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

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?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?