CAT03 quant doubts

Can some one tell me the answers of following CAT03 questions

10. When the curves y = log10 x and y = x-1 are drawn in the x-y plane, how many times do they intersect for values x > 1 ?

  • a. Never
  • b. Once
  • c. Twice
  • d. More than twice.
  • e.Not Attempted

16. The number of non-negative real roots of 2x - x - 1 = 0 equals

  • a. 0
  • b. 1
  • c. 2
  • d. 3
  • e.Not Attempted

1. one point if you plot

1. one point if you plot them . well you exactly need to plot them , knowing the shap and limits of the curve would suffive

2. 2 points , again plot 2^x and x+1