I suggest you calculate (1) how many numbers are in total, and (2) how many numbers in that range do NOT have 6 as a digit. Then you can subtract the result of (1) minus the result of (2).
91.
16
it s 243..
Infinitely many. The number pi , for example, is between 1 and 1000 and, since pi is a transcendental number, it contains infinitely many digits. Plus, there are all the irrational numbers - each with infinitely many digits, and all the rationals with recurring decimals - again with infinitely many digits.
999 are whole.
123
Not couting 1 and 1000, there would be 998 numbers.
252 of them.
it s 243..
Infinitely many. The number pi , for example, is between 1 and 1000 and, since pi is a transcendental number, it contains infinitely many digits. Plus, there are all the irrational numbers - each with infinitely many digits, and all the rationals with recurring decimals - again with infinitely many digits.
solution: we know that there are 25 prime numbers are between 1-100 and 168 prime numbers less than 1000. 100 x 100=10000(5 digits) 999 x 999=998001(6 digits) 1000 x 1000=1000000(7 digits) so our answer should be same as the number of prime numbers between 100 to 999. hence, 168-25=143. 143 prime numbers will be there less than 1000 whose square has 5 or 6 digits.
Numbers above 99 and under 1000 are 3-digits, all 900 of them.
There are 6484 digits BETWEEN the two given numbers.
There are 120 of them.
How many numbers are divisible by 9 between 5 and 1000²
1,3,5,7,9,11,13,15,17,19,31,33,35,37,39,51,53,55,57,59,71,73,75,77,079, 91,93,95,97,99,111,113,115,117,119,131,133,135,137,139,151,153,155, 157,159,171,173,175,177,179,191,193,195,197,199,311,313,315,317,319, 331,333,335,337,339,351,353,355,357,359,371,373,375,377,379,391,393, 395,397,399,511,513,515,517,519,531,533,535,537,539,551,553,555,557, 0559,571,573,575,579,591,593,595,597,599,711,713,715,717,719,731,733, 735,737,739,751,753,755,757,759,771,773,775,777,779,791,793,795,797, 799,911,913,915,917,919,931,933,935,937,939,951,953,955,957,959,971, 973,975,977,979,991,993,995,997,999
There are 90 palindromic numbers between 100 and 1000