Question

please give me right answer and fast ​

Answer 1

Step-by-step explanation:

18.

a number when divisible by 9 must be equal to 9 when digits are added

thus

1 + A + 2 + B + 5 = 9

so

A + B = 9 - 8 = 1

A + B = 1

19.

Pythagorean triplet means

a² + b² = c²

so

the 4th option is correct as

64 + 225 = 289

thus triplet is

( 8 , 15 , 17 )