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

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

Can you fill the blank with the correct number?

6 30 870 756030 _____

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Can you find out which options fits best with the missing column?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

What kind of band never plays music?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

Who has married many women but was never married?