6,800

[EECS]  6.8K(W) is one of standard numerical values for resistors (of tolerance class 5%). 6,800mF (microfarads) is one of standard numerical values for capacitors.

 

6,800, 6,801, 6,803, 6,805 & 6,809

[Tech.]  Motorola CPU families: 6800 family (6800, 6801, 6803, 6805 and 6809) and 68000 family (68000, 68008, 68010, 68020, 68030, 68040, 68060).

 

6,819

[Math.]  The equality 6819×3 = 20,457 uses each of 10 digits 0-9 once.

 

6,839

[Math.]  The ratio 54712/6839 = 8, using each of 9 digits 1-9 once, shows how to arrange a 9-book set on 2 shelves to mark the book #8.

 

6,840

[Math.]  Sum (in degrees) of all internal angles of a 40-side polygon.

 

6,849

[Math.]  Two multiples of number 6849, 6849×2 = 13,698 and 6849×3 = 20,547, use each of 10 digits 0-9 once.

 

6,864

[Math.]  6,864 = 6666+88+66+44.

 

6,869

[Math.]  A sequence of prime numbers: 5857, 6869, 7879 and 8887, each formed by 2 consecutive numbers, and their differences are 1012, 1010 and 1008, which are three consecutive even numbers.

 

6,888

[Math.]  68882 = 47,444,544, where digit 4 appears in 6 out of 8 positions.

 

6,894

[Math.]  Two multiples of number 3447, 3447×2 = 6894 and 3447×5 = 17,235, use each of 9 digits 1-9 once.

 

6,895

[Math.]  Two multiples of number 6895, 6895×2 = 13,790 and 6895×7 = 48,265, use each of 10 digits 0-9 once.