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

Eight of us go fourth, not back, to protect our king from an attack. What are we?

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

How can you write nineteen in a manner that if we take out one, it becomes twenty?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

In a classic wine shop, the list of three most popular wines are:
- The cost of 1 French wine bottle: 500$
- The cost of 1 German wine bottle: 100$
- The cost of 20 Dutch wine bottles: 100$

John entered the wine shop and he needs to buy
- All three types of wine bottles.
- Needs to buy Dutch wine bottles in multiples of 20.
- Need to buy 100 wine bottles in total.

John has only 10000$. How many wine bottles of each type, John must buy?

I have branches, but no fruit, trunk or leaves. What am I?

You have two bottles of pills marked with labels A and B. The pills are identical. The doctor has asked you to take one A pill and one B pill daily. You cant take more or less than that.

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

What is the word or phrase?

I’m orange, I wear a green hat and I sound like a parrot. What am I?