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Answer to Above:

x^2 + x = x + 1 So x^2 = 1
So x = 1 or -1
So A

Answer to Above:

The angles in the triangle are: 35, 90 and x.
35 + 90 + x = 180,
So x = 55

Answer to Above: *****3
*3 = 4
**3 = * of *3 = * of 4 = 5
So after five * it comes back to 3

Answer to Above ...

Hack: Choose x = y = 1.

2^ (2^2) = 2^4 = 16

Answer: 8

6 + 8 = 14
6 * 8 = 48

Answer: 110

1*1 + 1 = 2
2*2 + 2 = 6
..
10*10 + 10 = 110

Answer: 50


5 + 7 = 12
7 + 12 = 19
12 + 19 = 31
19 + 31 = 50

Answer: 2 * 3 + 4 - 5 = 5

Answer: 2*8-2-8=6

Answer: 61

1*1 + 2*2 = 5
2*2 + 3*3 = 13
..
5*5+ 6*6 = 61

Answer: 110

1*1 + 1 = 2
2*2 + 2 = 6
..
10*10 + 10 = 110