Question

If 21,5=13 and 7,9=8 and 16,2=9 1,9 =?

Answer 1

Step-by-step explanation:

1,9=5..................

Answer 2

Answer:

5

Step-by-step explanation:

Analysing the question I get ,

There are nothing but the mean of 2 given no.

e.g 21, 5 = 13

= (21+5)/2

= 26/2

= 13

Again,

7,9 = 8

= (7+9)/2

= 16/2

= 8

And So on,

16,2 = 9

= (16+2)/2

= 18/2

= 9

So, Our Answer should be

1,9 = ?

(1 + 9)/2

10/2

5

Hence the required answer is 5 .