What is the Surname of Barbie Doll?

In the given picture, in how many ways can you read the word "Tiger"?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?

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

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Count the number of triangles in the below picture?

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?