Question

Please help it's timed

Answer 1

Try this order:
2,1,5,6,4,3
that means to put the first tile in the second place of sequence.

Answer 2

You need to square both sides to start getting rid of square roots.
Then simplify, but you still have one square root.
Square both sides again.
Simplify to get a quadratic equation.
Use the quadratic formula.

Tile order: 2, 1, 6, 5, 4