Be active and find the killer in the picture Riddle below.

Decode below rebus
D
N
A
T
S , D

What occurs twice in a week, once in a year but never in a day?

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?

Find the number of squares in the below-given picture.

The more it dries, the wetter it becomes. Can you tell what it is?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

Can you count the number of triangles in the given figure?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?