6.
Only one. 123456.
The number 100,000,000 has 9 digits. You can count them as follows: 1 followed by eight zeros, which totals nine characters in total.
100000
100000 - including numbers with leading 0s
99999 and 100000
100001
Only one. 123456.
The number 100,000,000 has 9 digits. You can count them as follows: 1 followed by eight zeros, which totals nine characters in total.
100000
100000 - including numbers with leading 0s
99999 and 100000
The least whole number with 6 digits, since 100000 > 99999
100000 000100 -------- 100100 --------
654321-100000= 554321 combinations
100000 of course. If digits have to be different then 123456.
(987 + 13)(6 + 4) x 2 x 5 = 1000 x 10 x 10 = 100000
Yes, Akira Haraguchi , a 60-year old has memorized and repeated 100,000 digits of PI in 16 hours.