Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

A guard is positioned at the one side of the bridge saying ‘A’. His task is to shoot all those who try to leave from ‘A’ to the other side and say ‘B’. He also need to welcome the person who comes from another side ‘B’ to his side ‘A’. The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave. You are at side ‘A’ and wish to go to another side ‘B’. you also know that it would take 1:45 hr to cross the bridge. How will you cross the bridge?

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?

Identify the next two numbers in this series.

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

Count the squares in the matchstick puzzle below?

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

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

When it is alive we sing, when it is dead we clap our hands. What is it?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

By using 'because' continuously three times, can you make an English statement ?