Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

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

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

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

What number divided by 4 is the same as that number minus 4?

How many times can you subtract the number 5 from 25?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Can you find the 09 errors in the picture below?

How could a baby fall out of a twenty-story building onto the ground and live?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.