How many times does 7 appear from 1 to 100?

Answer 1

19

Answer 2

19 7, 17, 27, 37,47, 57, 67, 77, 87, 97 70, 71, 72, 73, 74, 75, 76, 78, 79

Answer 3

To find out how many times the digit 7 appears from 1 to 100, we can break it down into three categories: numbers with a 7 in the units place, numbers with a 7 in the tens place, and the number 7 itself.

There are 10 numbers (7, 17, 27, 37, 47, 57, 67, 77, 87, 97) with 7 in the units place, 10 numbers (70, 71, 72, 73, 74, 75, 76, 77, 78, 79) with 7 in the tens place, and the number 7 itself.

Therefore, the digit 7 appears 19 times from 1 to 100.

Answer 4

There are 10 numbers with 7 in the one's digit, and 10 numbers with 7 in the ten's digit. Thus, 7 appears 14 times in 13 numbers between 1 and 100.

Answer 5

20 times