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

A gardener planted the Lemon trees in a mathematical ordered way (i.e. he planted a tree in rows).
He created a total of 19 rows of trees.

Note: There should be more than 2 trees to count as a row.

What is the minimum number of trees required by the gardener to have 19 rows of trees?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

Can you replace the question mark with the correct number in the below table sequence?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?