Leaving out 077, since it is actually a two digit number, the answer is 35.
Excluding numbers with leading 0s, there are 6804 such numbers.
There are exactly 71 of them.
There are 27 such numbers.
There are 12 sevens in 84.
There are 8 sevens in 56.
Excluding numbers with leading 0s, there are 6804 such numbers.
There are 900 three-digit numbers, ranging from 100 to 999.
There are exactly 71 of them.
27: 077,177,277,377,477,577,677,877,977,717,727,737,747,757,767,777,787,797
There are 27 such numbers.
7 goes into 56 exactly eight times !
there are four sevens in 28.
There are 12 sevens in 84.
There are 8 sevens in 56.
There are 13.714285 sevens in 96
Prime numbers have exactly two numbers. There is theoretically an infinite number of them.
how many numbers exactly have 4 digits ? 8900, 8999, 9000, 9999