**Building Puzzle - 16 November**

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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20

ReplyDeletefrom 1 to 99 consider all numbers as two digit numbers

ReplyDelete00

01

02

.

.

.

99

so total no.of digits=2*100=200

each digit (0,1,....9) appears equal no.of times so 9 appears=200/10=20 times from 1 to 100

19

ReplyDelete20 9's r there.

ReplyDelete19

ReplyDelete20, 09-89 = 9, 90-99 = 11

ReplyDeleteThere are another 20 "9"s upside down!!!!!!

ReplyDelete20

ReplyDelete20

ReplyDelete19

ReplyDelete20

ReplyDelete20 bcz 9,19,29,39,49,59,69,79,89,90,91 92 93 94 95 96 97 98 99.hre there r 20 9's present hence the answer is 20

ReplyDeletethat amounts to 19 dumb ass

DeleteYou have to count 99 twice dumb ass.

Deletehahahahaha

Delete20

ReplyDelete20

ReplyDeleteThis comment has been removed by the author.

ReplyDeletethere are 20- 9's

ReplyDeleteonly single "9"

ReplyDelete1. 09

ReplyDelete2. 19

3. 29

4. 39

5. 49

6. 59

7. 69

8. 79

9. 89

10. 90

11+12. 99

the 9. 89 would technically 13

20 9s are used for 1 - 100 street numbers

ReplyDelete20

ReplyDelete40.

ReplyDeleteThere are 20 9's and 20 6's which is nothing but '9' reversed.

This comment has been removed by the author.

ReplyDelete19

ReplyDelete2

ReplyDeleteThere's 11 because

ReplyDelete9

19

29

39

49

59

69

79

89

That's 9 and then for 99 there are 2 so it's 11