Question

50 points ..Question 8 , anyone ?

Answer 1

option is (4)
because
253 => 3 +2=5
495=> 4+5=9
143=> 1+3=4
in the same way 374=> 3+4=7

Answer 2

Expand the numbers:
1. 253 = 2,5,3
2. 495 = 4,9,5
3. 143 = 1,4,3

Add two number like that so, 3rd will be its answer":
1. 3+2 = 5
2. 4+5 = 9
3. 1+3 = 4 

It is proved this series is correct:

Now Let's Check options:
1. 152
2. 105
3. 903
4. 374

Expand them:

1. 152 = 1,5,2
2. 105 = 1,0,5
3. 903 = 9,0,3
4. 374 = 3,7,4

Add two numbers like that so 3rd will be its answer:
1. 1+2 ≠ 5
    5+2 ≠ 1
    5+1 ≠ 2
2. 1+0 ≠ 5
     5+0 ≠ 1
    5+1 ≠ 0
3. 9+3 ≠ 0
    0+9 ≠ 3
    0+3 ≠ 9
4. 4+3 = 7
So, 4th option is correct.
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Hope you understand the solution.