I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

You need to remove two matchsticks to make the below equation true. Can you do it ?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

What jumps when it walks and sits when it stands?

Who can jump higher than a Mountain?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?