Whole Numbers and Cardinal Numbers: 10 to 99

Numbers from 11 through 19 are:

11 eleventh

DarkViolet Box LawnGreen Box Plum Box DarkCyan Box PowderBlue Box DarkOrange Box DarkBlue Box Teal Box Aqua Box Maroon Box RoyalBlue Box

12 twelth

RoyalBlue Box DarkKhaki Box Gold Box MediumSlateBlue Box DarkTurquoise Box Green Box DarkSlateBlue Box Brown Box Cyan Box DeepSkyBlue Box SaddleBrown Box DarkSeaGreen Box

13 thirteenth

DarkSeaGreen Box Peru Box Tan Box HotPink Box DeepPink Box BurlyWood Box Chocolate Box SandyBrown Box ForestGreen Box BlueViolet Box Turquoise Box Pink Box Yellow Box

14 fourteenth

Yellow Box Khaki Box Purple Box MediumBlue Box SpringGreen Box MidnightBlue Box SkyBlue Box Lavender Box DodgerBlue Box GreenYellow Box Sienna Box CornflowerBlue Box Chartreuse Box SlateBlue Box

15 fifteenth

Fuchsia Box Thistle Box MediumTurquoise Box DarkOrchid Box MediumVioletRed Box DarkMagenta Box Blue Box RosyBrown Box SeaGreen Box OliveDrab Box MediumAquamarine Box DarkGreen Box CadetBlue Box DarkOliveGreen Box Olive Box

16 sixteenth

Wheat Box Magenta Box LimeGreen Box Goldenrod Box MediumSeaGreen Box YellowGreen Box Indigo Box MediumPurple Box DarkGoldenrod Box SteelBlue Box MediumSpringGreen Box Orchid Box Aquamarine Box Aquamarine Box Aquamarine Box Aquamarine Box

17 seventeenth

CornflowerBlue Box BurlyWood Box MediumAquamarine Box DarkMagenta Box MediumSpringGreen Box DarkOrange Box DarkGreen Box Aquamarine Box DarkOrchid Box Blue Box SeaGreen Box Tan Box DarkGoldenrod Box Navy Box MediumTurquoise Box LimeGreen Box SpringGreen Box

18 eighteenth

BlueViolet Box Goldenrod Box Chartreuse Box Peru Box DarkCyan Box Olive Box OliveDrab Box Green Box Pink Box DarkViolet Box Thistle Box Chocolate Box MidnightBlue Box MediumBlue Box DarkKhaki Box ForestGreen Box DarkBlue Box Teal Box

19 nineteenth

DarkBlue Box Teal Box SaddleBrown Box Sienna Box Indigo Box Lavender Box DodgerBlue Box MediumOrchid Box YellowGreen Box RoyalBlue Box Purple Box Turquoise Box DeepSkyBlue Box MediumPurple Box DeepPink Box Brown Box Fuchsia Box Khaki Box CadetBlue Box

Numbers from 20 through 29 are:

20 twentieth

DarkSlateBlue Box MediumSeaGreen Box Yellow Box Wheat Box Orchid Box DarkSeaGreen Box Plum Box Empty Box Cyan Box DarkOliveGreen Box Magenta Box HotPink Box SandyBrown Box SlateBlue Box Maroon Box RosyBrown Box PowderBlue Box Aqua Box LawnGreen Box SkyBlue 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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