Question

9=4,10=3,16=7,17=9,8=5,20=6,21=?,31=?

Answer 1

Hlo guys!!!
Here is ur answer

Soln:-

9=4
nine =4

10=3
ten=3

16=7
sixteen=7

17=9
seventeen=9

8=5
eight=5

20=6
twenty=6

It means that the no. of letter is the answer
so,

21=?
twenty one =9

31=?
thirty one =9