How can one talk without saying a single word?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Find the next number in the following series:
6, 14, 26, 98, __?

Identify the next two numbers in this series.

101, 112, 131, 415, 161, 718, ???, ???

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

What do you answer even though it never asks you questions?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?