# What's the sequence in the below 2 grids?

The sequences are different in each grid, can you solve all 4 question marks?

Grid 1:

Grid 2:

Note: Since it are 2 seperate grids, the sequence logic is different.

I think the answer to the first grid is as follows

Reasoning

Reading the existing grid top-to-bottom and left-to-right gives the sequence $$4,8,2,6,2,2,4,8$$
We notice that from the 3rd element onwards each number is the product of the previous two modulo $$10$$,
e.g, $$2 \times 6 = 12 \equiv 2\mod 10$$
This means that the next element at the top is $$4 \times 8 = 32 \equiv \textbf{2}\mod 10$$
and the next element at the bottom is $$8 \times 2 = 16 \equiv \textbf{6}\mod 10$$

Less certain, but I think the answer to the second grid is as follows

Reasoning

This time let us read each column as a single number by concatenating the digits i.e, $$89, 18, 16, 12$$
In this sequence, each number is just double the second digit (bottom digit) of the previous number,
e.g, $$9 \times 2 = 18, 8 \times 2 = 16$$
This means the next two-digit number is $$2 \times 2 = 4 = 04$$.