It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

O_er_t_o_

Complete the missing letters of the given word.

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

What does this say?

XLR8

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

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

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

Jessica is telling her friends this story and asks them to guess if it’s the truth or a lie: “There was a man sitting in a house at night that had no lights on at all. There was no lamp, no candle, and no other source of light. Yet, he sat in the house and read his book happily.” Her friends say she’s lying, but Jessica corrects them and says she’s telling the truth. Jessica’s story is true—but how?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?