Question

What is the answer to this maths watch question? Look at screenshot attached. Thank you.

Answer 1

Answer+Step-by-step explanation:

14 - 9 = 5 then (14 - 5 = 9 and 14 + 5 = 19)

…………………………………………………………………

1+18=19

2+17=19

3+16=19

4+15=19

5+14=19

6+13=19

7+12=19 ⇒ 7 - 12 = -5

8+11=19

9+10=19

Answer 2

14-x=9

14=x+9

x=14-9

x=5

14+5=19

x+y=19

x-y=(-5)

Adding both equations,

We get,

x+y=19

x-y=(-5)

2x=14

x=7

x+y=19

7+y=19

y=12