ans is- 16=7, 17=9; logic is- in 9= "nine", letters in this word=4 so =4 and 99="ninetynine" , letters in this word=10 so =10, hence, 16= "sixteen" = 7 17="seventeen"= 9
On behalf of Sture Sjöstedt
Complete the series-
9 5 14 8 3 12 7 2 23 5 2 29 3 9 ??