Whole Numbers and Cardinal Numbers: 10 to 99

Numbers from 11 through 19 are:

11 eleventh

MediumPurple Box Sienna Box DarkGreen Box DarkOrange Box Khaki Box Maroon Box SlateBlue Box SkyBlue Box SandyBrown Box DarkOliveGreen Box PowderBlue Box

12 twelth

PowderBlue Box SteelBlue Box GreenYellow Box DeepPink Box MediumSpringGreen Box DarkCyan Box Peru Box LawnGreen Box DarkSeaGreen Box Gold Box Magenta Box MediumAquamarine Box

13 thirteenth

MediumAquamarine Box Purple Box Aquamarine Box MediumSeaGreen Box BurlyWood Box RosyBrown Box DodgerBlue Box Chocolate Box DarkBlue Box DarkMagenta Box Blue Box SeaGreen Box YellowGreen Box

14 fourteenth

YellowGreen Box Brown Box Chartreuse Box Olive Box RoyalBlue Box Green Box Tan Box DarkKhaki Box LimeGreen Box MediumTurquoise Box Orchid Box Plum Box Fuchsia Box CornflowerBlue Box

15 fifteenth

Turquoise Box MidnightBlue Box DarkTurquoise Box DarkGoldenrod Box Empty Box Indigo Box BlueViolet Box CadetBlue Box DarkOrchid Box OliveDrab Box Lavender Box SpringGreen Box MediumBlue Box Pink Box MediumVioletRed Box

16 sixteenth

Teal Box Coral Box MediumOrchid Box DarkViolet Box MediumSlateBlue Box Navy Box Yellow Box Cyan Box HotPink Box DarkSlateBlue Box DeepSkyBlue Box Violet Box Thistle Box Thistle Box Thistle Box Thistle Box

17 seventeenth

MediumPurple Box Sienna Box DarkGreen Box DarkOrange Box Khaki Box Maroon Box SlateBlue Box SkyBlue Box SandyBrown Box DarkOliveGreen Box PowderBlue Box SteelBlue Box GreenYellow Box DeepPink Box MediumSpringGreen Box DarkCyan Box Peru Box

18 eighteenth

DarkSeaGreen Box Gold Box Magenta Box MediumAquamarine Box Purple Box Aquamarine Box MediumSeaGreen Box BurlyWood Box RosyBrown Box DodgerBlue Box Chocolate Box DarkBlue Box DarkMagenta Box Blue Box SeaGreen Box YellowGreen Box Brown Box Chartreuse Box

19 nineteenth

Brown Box Chartreuse Box Olive Box RoyalBlue Box Green Box Tan Box DarkKhaki Box LimeGreen Box MediumTurquoise Box Orchid Box Plum Box Fuchsia Box CornflowerBlue Box ForestGreen Box SaddleBrown Box Turquoise Box MidnightBlue Box DarkTurquoise Box DarkGoldenrod Box

Numbers from 20 through 29 are:

20 twentieth

Indigo Box BlueViolet Box CadetBlue Box DarkOrchid Box OliveDrab Box Lavender Box SpringGreen Box MediumBlue Box Pink Box MediumVioletRed Box Aqua Box Teal Box Coral Box MediumOrchid Box DarkViolet Box MediumSlateBlue Box Navy Box Yellow Box Cyan Box HotPink 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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