i took an IQ test recently and this was one of the questions. i got a 119 btw but uhh i think i guess 19 because 7 17 27 37 47 57 67 70 71 72 73 74 75 76 77 78 79 87 97 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 but i didnt realize until it was over that there were 2 7's in 77 so yea there are 20 7's from 1-100.
100
5.28751 7s equals 37.
7,17,27,37,47,57,67,70,71,72,73,74,75,76,77(two sevens),78,79,87,97=20 times
5
14
18
80.
6
answer:4
10
6
4