**Tricky Nine Maths Riddle - 18 January**

A new medical building containing 100 offices had just been completed. Mark was hired to paint the numbers 1 to 100 on the doors. How many times will Mark have to paint the number nine?

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A new medical building containing 100 offices had just been completed. Mark was hired to paint the numbers 1 to 100 on the doors. How many times will Mark have to paint the number nine?

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20 times.

ReplyDeleteMark has to paint the number nine , 20 times.

ReplyDeleteonce

ReplyDeleteOnce

ReplyDelete20

ReplyDeletezero time because there is no 9th floor in a buliding

ReplyDelete10 times

ReplyDelete20 times....

ReplyDelete10 times in the 10s place (the 90's)

10 times in the 1s place (09,19,29...)

what about 99 it only occurs once ...

Deletethere are two 9's in 99. therefore he painted two 9's

Delete40

ReplyDelete20

ReplyDeleteits 21 guys because he has to paint 1 two times in "11"...

ReplyDelete:P

20 tyms......

ReplyDelete(9,19,29,39,49,59,69,79,89,90,91,92,93,94,95,96,97,98,99)

19 times

ReplyDeletesorry,20 times

DeleteThis comment has been removed by the author.

ReplyDeleteThis comment has been removed by the author.

ReplyDelete11

ReplyDelete21

ReplyDelete29

ReplyDeletemark had to paint 11 nines.....09,19,29,39,49,59,69,79,89,99..hence proved..

ReplyDeleteforgot the numbers 90 91 92 93 94 95 96 97 and 98

Delete20 (9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99)

ReplyDelete11 times

ReplyDelete40. every time he painted a 6, he also pained a 9 just upside down.

ReplyDelete