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

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

I travel all around the world but always stay in the corner. What am I?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

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

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

Prove that twice of ten is the same as twice of eleven.

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Can you start the fire using two pieces of wood?

Replace the question mark with the correct number in below Picture:

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927