Can you fill the blank with the correct number?

6 30 870 756030 _____

Replace the question mark with the correct number.

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

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

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

When we see 2 but call 10?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?