Difficulty: Easy
Correct Answer: Tuesday
Explanation:
Introduction / Context:Weekday progression repeats every 7 days. To find the future weekday after N days, reduce N modulo 7 and advance that many steps from the starting day.
Given Data / Assumptions:
Concept / Approach:Compute N mod 7. A remainder r means “advance r weekdays.” If r = 0, the weekday is unchanged. If r = 1, move one day forward, etc.
Step-by-Step Solution:
64 ÷ 7 = 9 weeks with remainder 1 (since 7 × 9 = 63).Remainder = 1 ⇒ advance 1 day from Monday.Monday + 1 day = Tuesday.Verification / Alternative check:
Add 7 days nine times (returns to Monday), then add one more day ⇒ Tuesday.Why Other Options Are Wrong:
Saturday/Friday/Thursday correspond to different remainders (−2, −3, −4) and do not match 64 mod 7 = 1.Common Pitfalls:
Using 64/7 ≈ 9.14 and misinterpreting decimals; only the remainder matters.Final Answer:Tuesday
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