Find the Goldfish below the given Image.

Which tank will fill first?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

I can be cracked, made, told, and played. What am I?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

If you say my name, I will no longer exist. What am I?