How many palindromic numbers are between 100 to 600?

Answer 1

Palindromic numbers are those that read the same forwards and backwards. Between 100 and 600, the three-digit palindromic numbers are of the form ( aba ), where ( a ) is the first and last digit, and ( b ) is the middle digit. For the range specified, the first digit ( a ) can be 1, 2, 3, 4, or 5 (five choices), and the middle digit ( b ) can be any digit from 0 to 9 (ten choices). Therefore, there are ( 5 \times 10 = 50 ) palindromic numbers between 100 and 600.

Answer 2

Palindromic numbers between 100 and 600 are those that read the same forwards and backwards. The three-digit palindromic numbers in this range are 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 202, 212, 222, 232, 242, 252, 262, 272, 282, 292, 303, 313, 323, 333, 343, 353, 363, 373, 383, 393, 404, 414, 424, 434, 444, 454, 464, 474, 484, 494, 505, 515, 525, 535, 545, 555, 565, 575, 585, and 595. There are a total of 49 palindromic numbers between 100 and 600.