What does this rebus riddle means ?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

100 birds were sitting on a tree.
A shooter shoots one of the birds and the bird dies instantly.

How many are left now?

Take away the whole and some still remain. What is it?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

What is represented by this BrainBat Pattern?

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