Whole Numbers and Cardinal Numbers: 10 to 99

Numbers from 11 through 19 are:

11 eleventh

MediumSpringGreen Box Magenta Box Chocolate Box DeepSkyBlue Box MediumSlateBlue Box Aquamarine Box Pink Box Gold Box DarkGoldenrod Box DarkSlateBlue Box Indigo Box

12 twelth

Indigo Box SkyBlue Box DarkSeaGreen Box MediumAquamarine Box Empty Box ForestGreen Box Chartreuse Box MidnightBlue Box DarkBlue Box Coral Box YellowGreen Box BurlyWood Box

13 thirteenth

BurlyWood Box DodgerBlue Box Turquoise Box SandyBrown Box DarkOliveGreen Box DarkMagenta Box MediumPurple Box HotPink Box SeaGreen Box CadetBlue Box MediumSeaGreen Box SteelBlue Box SpringGreen Box

14 fourteenth

SpringGreen Box CornflowerBlue Box LawnGreen Box Wheat Box LimeGreen Box Brown Box Blue Box Fuchsia Box Khaki Box Green Box MediumBlue Box Navy Box Yellow Box DeepPink Box

15 fifteenth

Plum Box DarkTurquoise Box Cyan Box RoyalBlue Box Thistle Box Olive Box Orchid Box DarkOrange Box DarkKhaki Box PowderBlue Box MediumOrchid Box Tan Box DarkOrchid Box Violet Box Maroon Box

16 sixteenth

Teal Box SlateBlue Box MediumVioletRed Box GreenYellow Box Purple Box DarkViolet Box RosyBrown Box Peru Box Aqua Box Sienna Box OliveDrab Box SaddleBrown Box DarkCyan Box DarkCyan Box DarkCyan Box DarkCyan Box

17 seventeenth

MediumSpringGreen Box Magenta Box Chocolate Box DeepSkyBlue Box MediumSlateBlue Box Aquamarine Box Pink Box Gold Box DarkGoldenrod Box DarkSlateBlue Box Indigo Box SkyBlue Box DarkSeaGreen Box MediumAquamarine Box Empty Box ForestGreen Box Chartreuse Box

18 eighteenth

DarkBlue Box Coral Box YellowGreen Box BurlyWood Box DodgerBlue Box Turquoise Box SandyBrown Box DarkOliveGreen Box DarkMagenta Box MediumPurple Box HotPink Box SeaGreen Box CadetBlue Box MediumSeaGreen Box SteelBlue Box SpringGreen Box CornflowerBlue Box LawnGreen Box

19 nineteenth

CornflowerBlue Box LawnGreen Box Wheat Box LimeGreen Box Brown Box Blue Box Fuchsia Box Khaki Box Green Box MediumBlue Box Navy Box Yellow Box DeepPink Box Goldenrod Box MediumTurquoise Box Plum Box DarkTurquoise Box Cyan Box RoyalBlue Box

Numbers from 20 through 29 are:

20 twentieth

Olive Box Orchid Box DarkOrange Box DarkKhaki Box PowderBlue Box MediumOrchid Box Tan Box DarkOrchid Box Violet Box Maroon Box DarkGreen Box Teal Box SlateBlue Box MediumVioletRed Box GreenYellow Box Purple Box DarkViolet Box RosyBrown Box Peru Box Aqua 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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