Last year Dallas was 3 times the age of his sister Darcy. Darcy is twice as old as Dexter who is 8 right now. How old is Dallas now? Let's think first. Chain of thought:
Darcy = 2 * Dexter = 2 * 8 = 16. Last year Darcy was 16 - 1 = 15. Dallas was 3 times Darcy last year = 3 * 15 = 45. Dallas is a year older now = 45 + 1 = 46. Dallas is 46 years old now.
Therefore, the answer is 46.