Whole Numbers and Cardinal Numbers: 10 to 99

Numbers from 11 through 19 are:

11 eleventh

DeepSkyBlue Box SaddleBrown Box SteelBlue Box Peru Box Purple Box Brown Box CornflowerBlue Box Chartreuse Box Teal Box RoyalBlue Box MediumSlateBlue Box

12 twelth

MediumSlateBlue Box DarkSlateBlue Box Empty Box Navy Box DarkSeaGreen Box DeepPink Box DarkBlue Box DarkMagenta Box Olive Box DarkOrange Box CadetBlue Box Aqua Box

13 thirteenth

Aqua Box Aquamarine Box LawnGreen Box ForestGreen Box YellowGreen Box PowderBlue Box Gold Box Tan Box Khaki Box Violet Box Yellow Box GreenYellow Box SeaGreen Box

14 fourteenth

SeaGreen Box MediumOrchid Box MidnightBlue Box DarkGoldenrod Box LimeGreen Box MediumBlue Box Cyan Box DarkTurquoise Box Indigo Box OliveDrab Box Lavender Box DarkKhaki Box Pink Box Orchid Box

15 fifteenth

Green Box DarkOliveGreen Box BurlyWood Box Goldenrod Box DodgerBlue Box HotPink Box DarkViolet Box SlateBlue Box MediumAquamarine Box MediumPurple Box SkyBlue Box DarkGreen Box SpringGreen Box Coral Box MediumSpringGreen Box

16 sixteenth

MediumVioletRed Box Turquoise Box BlueViolet Box Chocolate Box RosyBrown Box DarkCyan Box SandyBrown Box MediumTurquoise Box Fuchsia Box Wheat Box DarkOrchid Box Blue Box Sienna Box Sienna Box Sienna Box Sienna Box

17 seventeenth

DeepSkyBlue Box SaddleBrown Box SteelBlue Box Peru Box Purple Box Brown Box CornflowerBlue Box Chartreuse Box Teal Box RoyalBlue Box MediumSlateBlue Box DarkSlateBlue Box Empty Box Navy Box DarkSeaGreen Box DeepPink Box DarkBlue Box

18 eighteenth

Olive Box DarkOrange Box CadetBlue Box Aqua Box Aquamarine Box LawnGreen Box ForestGreen Box YellowGreen Box PowderBlue Box Gold Box Tan Box Khaki Box Violet Box Yellow Box GreenYellow Box SeaGreen Box MediumOrchid Box MidnightBlue Box

19 nineteenth

MediumOrchid Box MidnightBlue Box DarkGoldenrod Box LimeGreen Box MediumBlue Box Cyan Box DarkTurquoise Box Indigo Box OliveDrab Box Lavender Box DarkKhaki Box Pink Box Orchid Box Plum Box Maroon Box Green Box DarkOliveGreen Box BurlyWood Box Goldenrod Box

Numbers from 20 through 29 are:

20 twentieth

HotPink Box DarkViolet Box SlateBlue Box MediumAquamarine Box MediumPurple Box SkyBlue Box DarkGreen Box SpringGreen Box Coral Box MediumSpringGreen Box Thistle Box MediumVioletRed Box Turquoise Box BlueViolet Box Chocolate Box RosyBrown Box DarkCyan Box SandyBrown Box MediumTurquoise Box Fuchsia Box

21 twenty-first
22 twenty-second
23 twenty-third
24 twenty-forth
25 twenty-fifth
26 twenty-sixth
27 twenty-seventh
28 twenty-eighth
29 twenty-ninth

Numbers from 30 through 90, counting by tens, are:

30 thirtieth
40 fortieth
50 fiftieth
60 sixtieth
70 seventieth
80 eightieth
90 ninetieth

We note that fourth is written with a u but fortieth is written without a u.

We write 31 as thirty-first. We write 85 as eighty-fifth.

Two-digit numbers are called tens.

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