TCS Company Numerical Ability Algebra

Three distinct single-digit number A,B and C are in geometric progression. If abs(x) for real X is the absolute value of x ( x if x is positive or zero, and –x if x is x is negative), then the number of different possible values of abs(A + B - C) is
o 3
o 5
o 6
o 4

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TCS Other Question
27. Two vehicles A and B leave from city Y to city X. A overtakes B at 10:30am and reaches city X at 12:00pm. It waits for 2 hrs and returns to city Y. on its way it meet B at 3:00pm and reaches city Y at 5:00pm. B reaches city X, waits for 1 hr and returns to city Y. After how many hours will B reach city Y from the time A overtook him for the first time?
o 49.5 hrs
o 37.5 hrs
o 41.5 hrs
o 50 hrs
 In this question, X^Y means, X raised to the power Y. How many integers x satisfy the equation (x^2 - x - 1)^(x + 2)= 1?
o 4
o 2
o 3
o None of the other 3 choices