Puzzles

21 In principle, no matter how you block the window, it will still be square because blocking it doesn't change its shape.

You only need to block half of the window, and the remaining part is considered a new window (and it is square, with a width of 1 meter and a height of 1 meter).

#21: the window was square, 1 x 1.
And he blocked the window only on one side, that is, half of it.

It should remain square. But in your case, the window will be rectangular and have a width of 0.5.

Added 1 minute ago

#22 - 9, 4, and 1. Another possible option - 6, 6, and 1 - doesn't work because there is an older child.

Could you please provide more details so that everyone understands? Personally, without knowing the answer, I wouldn't understand what you mean...