Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Consider this: Arnold Schwarzenegger has a big one. Michael J. Fox has a small one. Prince doesn’t have one. The Pope has one but never uses it. Bill Clinton has one and uses it all the time. What is it?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Find out the missing number in the picture attached:

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?

What begins with T, ends with T, and has T in it?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

I know a nine-letter word having only one vowel.
Do you ?