{"id":25023,"date":"2026-05-03T15:56:50","date_gmt":"2026-05-03T15:56:50","guid":{"rendered":"https:\/\/albotips.com\/?p=25023"},"modified":"2026-05-03T15:56:50","modified_gmt":"2026-05-03T15:56:50","slug":"at-first-glance-this-looks-like-a-simple-question-but-its-designed-to-trick-your-brain","status":"publish","type":"post","link":"https:\/\/albotips.com\/?p=25023","title":{"rendered":"At first glance, this looks like a simple question\u2026 but it\u2019s designed to trick your brain!"},"content":{"rendered":"
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Let\u2019s go step by step.<\/p>\n

We are told a man has 9 sons<\/strong>, so that part is clear.<\/p>\n

Then it says: each son has a sister<\/strong>.<\/p>\n

Most people assume this means 9 different sisters, leading to:
\n9 sons + 9 sisters + father = 19 people \u274c<\/p>\n

But the statement never says \u201ceach has a different sister.\u201d It only says they have a sister<\/strong>.<\/p>\n

That means all 9 sons can share one sister<\/strong>.<\/p>\n

So the correct count is:<\/p>\n