Perfect Squares

1/14

.071428

1/13

.076932 7.6932%

36²

1296

14²

196

5²

25

24²

576

9²

81

Solve for Nth Triangular number

n(n+1)/2

1/32

.03125 3.125%

1/16

.0625 6.25%

1/15

.066666 6.6666%

1/12

.083333 8.333%

1/11

.090909 9.0909%

1/9

.111111 11.111%

1/7

.142857 14.2857%

1/6

.16666666 16.666%

1²

1

1³

1

First 10 Triangular Numbers

1, 3, 6, 10, 15, 21, 28, 36, 45, 55

First 10 Pentagonal Numbers

1, 5, 12, 22, 35, 51, 70, 92,117, 145

First Hexagonal Numbers

1, 6, 15, 28, 45, 66, 91, 120, 153, 190

1 furlong

10 chains, 660 feet

10²

100

10³

1000

32²

1024

33²

1089

34²

1156

11²

121

35²

1225

5³

125

1 Gallon (ounces)

128 oz

11³

1331

37²

1369

12²

144

38²

1444

39²

1521

4²

16

1 rod (feet)

16.5 feet

40²

1600

13²

169

12³

1728

First Prime Numbers

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 107 109 113 127 131 137 139 149 151

Ton (short)

2000 lbs

6³

216

13³

2197

Ton (long)

2240 lbs

15²

225

16²

256

3³

27

14³

2744

17²

289

jigger

3 Tbsp

1 league

3 miles

1 Barrel (gallons)

31.5 gallons

18²

324

15³

3375

7³

343

6²

36

19²

361

2²

4

1 chain

4 rods, 66 feet

20²

400

oil Barrel

42 Gallons

1 acre (square feet)

43560 Sq. Feet

21²

441

22²

484

7²

49

8³

512

23²

529

25²

625

1 hogshead (Gallons)

63 gallons

4³

64

8²

64

26²

676

27²

729

9³

729

28²

784

2³

8

29²

841

3²

9

30²

900

31²

961