May 2 (Reuters) - Jack Dorsey-led Block posted a jump in first-quarter profit on Thursday as the payments firm benefited from resilient consumer spending and its own cost cuts. Adjusted net income rose to $542.9 million, or 85 cents per share, in the three months ended March 31, from $271.2 million, or 43 cents per share, a year earlier. (Reporting by Arasu Kannagi Basil in Bengaluru; Editing by Pooja Desai)