Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

Can you count the number of quadrilaterals in the picture below?

Can you divide the below-given shape into four equal and identical pieces?

How many triangles can you find in this given picture?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

Why is it very easy to weigh a fish?

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Rectify the following equality 101 - 102 = 1 by moving just one digit.