Question

Solve the following 4 × 4 Sudoku.

$\left[2\right]$

Answer 1

The solution for above Sudoku is

Explanation,

• For filling sudoku we can start from that row and column which has maximum number of entries.
• But here we have same number of entries in each row and column.

So, let's start with third row.

• We have values 3, 2 and 4 so only left value is 1.
• When we look first grid then 2 cannot be in $2^{nd}$Column and $4^{th}$grid ,so the best possible spot is $1^{st}$ block, so 2 is filled there.
• In first grid only one value left i.e. 3.

$\left[0.5\right]$

• In fourth grid only one value left i.e. 1.
• After one is filled in fourth grid then last blank would be 4.

$\left[0.5\right]$

• In $2^{nd}$ row only left value is 2.
• In $2^{nd}$grid the only left value is 3.

$\left[0.5\right]$

• In $3^{rd}$ column only left value is 2.
• In $4^{th}$ row last value is 3.

$\left[0.5\right]$