7,200

[Math.]  Sum (in degrees) of all internal angles of a 42-side polygon.

 

[Tech.] One of standardized baud rate (bits per second) in electronic data transmissions.

 

[Tech.]  The approximate temperature (oF) of an electric arc light.

 

7,206

[Math.]  72063 = 374,181,897,816 = (–3+7418–189–7–8+1–6)3.

 

7,208

[Math.]  72083 = 374,493,542,912 = (–3+7449–3+54–291+2)3.

 

7,230

[Math.]  Two consecutive sums of consecutive square numbers:

362+372+382+392+402 = 7,230 = 412+422+432+442.

 

7,235

[Math.]  Two multiples of number 7235, 7235×4 = 28,940 and 7235×5 = 36,175, use each of 10 digits 0-9 once.

 

7,245

[Math.]  72454 = 2,755,202,724,500,625.

 

7,253

[Math.]  A prime number whose 4 digits are the first 4 single-digit prime numbers: 2, 3, 5 and 7.

 

7,254

[Math.]  7,254 = 39×186, using each of 9 digits 1-9 once.

 

7,260

[Math.]  A triangular number (sum of all integers from 1 to 120): 7260 = 1+2+…+119+120.

 

7,269

[Math.]  The ratio 14538/7269 = 2, using each of 9 digits 1-9 once, shows how to arrange a 9-book set on 2 shelves to mark the book #2.

 

7,272

[Math.]  72722 = 52,881,984 = (5288+1984)2.

 

7,281

[Math.]  Two multiples of number 7281, 7281×3 = 21,843 and 7281×7 = 50,967, use each of 10 digits 0-9 once.

 

7,293

[Math.]  The ratio 14586/7293 = 2, using each of 9 digits 1-9 once, shows how to arrange a 9-book set on 2 shelves to mark the book #2.

 

7,295

[Math.]  Two multiples of number 7295, 7295×4 = 29,180 and 7295×5 = 36,475, use each of 10 digits 0-9 once.