[102] *Put all elements vertically aligned.
[103] *align divs to the right. *Change "reveal" to "show". *success (green) button for solutions
[101] *Change label button "Revelar" to "Mostrar"
[102] *Change "Reveal" to "Show" *Change button to green. *same border-color to every rectangle.
[101,102,103] *change button's label name to "Mostrar" instead of "Revelar" on como_usar.txt
[105] *fix padding (fractions alignment) *testSorting button to green.
[104] *Change button "Mostrar Solução" to green. and its label's references.
[102] *Centralize images. And expand explanation horizontally 100%.
[103] *Centralize Questions. And expand explanation horizontally 100%.