Whole Numbers and Cardinal Numbers: 10 to 99

Numbers from 11 through 19 are:

11 eleventh

Gold Box Green Box Coral Box MediumBlue Box Orchid Box GreenYellow Box DarkKhaki Box MediumPurple Box DarkOrange Box SandyBrown Box Goldenrod Box

12 twelth

Goldenrod Box Peru Box DarkTurquoise Box Blue Box Empty Box DarkGreen Box Pink Box Maroon Box Sienna Box Tan Box LawnGreen Box Aqua Box

13 thirteenth

Aqua Box Magenta Box DarkMagenta Box Violet Box SkyBlue Box RosyBrown Box BurlyWood Box Navy Box SteelBlue Box YellowGreen Box OliveDrab Box ForestGreen Box MediumTurquoise Box

14 fourteenth

MediumTurquoise Box MediumSpringGreen Box DeepPink Box SeaGreen Box SpringGreen Box MediumOrchid Box Chartreuse Box DarkSlateBlue Box Indigo Box Chocolate Box DarkGoldenrod Box DarkSeaGreen Box MediumSeaGreen Box BlueViolet Box

15 fifteenth

LimeGreen Box MidnightBlue Box Purple Box MediumSlateBlue Box Plum Box Olive Box DarkViolet Box Wheat Box Turquoise Box MediumAquamarine Box Teal Box MediumVioletRed Box CornflowerBlue Box Thistle Box DarkOliveGreen Box

16 sixteenth

Khaki Box DarkBlue Box PowderBlue Box DarkCyan Box HotPink Box DarkOrchid Box SlateBlue Box Yellow Box DeepSkyBlue Box Cyan Box RoyalBlue Box CadetBlue Box Aquamarine Box Aquamarine Box Aquamarine Box Aquamarine Box

17 seventeenth

BlueViolet Box Aqua Box CornflowerBlue Box MediumTurquoise Box MediumPurple Box Yellow Box Brown Box Violet Box Chocolate Box YellowGreen Box Peru Box SaddleBrown Box Empty Box Goldenrod Box Blue Box HotPink Box Magenta Box

18 eighteenth

SteelBlue Box Lavender Box Orchid Box SeaGreen Box LimeGreen Box DarkGoldenrod Box MediumSeaGreen Box BurlyWood Box DeepPink Box CadetBlue Box DarkCyan Box Chartreuse Box Khaki Box MediumAquamarine Box DarkSlateBlue Box Turquoise Box DodgerBlue Box MediumBlue Box

19 nineteenth

DodgerBlue Box MediumBlue Box DarkMagenta Box MediumOrchid Box Green Box Purple Box Coral Box Thistle Box Maroon Box MediumVioletRed Box Sienna Box Aquamarine Box DarkKhaki Box MediumSlateBlue Box Teal Box GreenYellow Box DarkOliveGreen Box Wheat Box PowderBlue Box

Numbers from 20 through 29 are:

20 twentieth

MediumSpringGreen Box DarkViolet Box MidnightBlue Box Tan Box DarkBlue Box OliveDrab Box Plum Box DarkGreen Box SkyBlue Box DarkOrange Box Navy Box DeepSkyBlue Box Pink Box DarkOrchid Box DarkTurquoise Box RosyBrown Box Gold Box ForestGreen Box Fuchsia Box RoyalBlue 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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