Birthday puzzle

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--------- #1487 - Birthday Puzzle
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- How did I know it was Sam’s birthday yesterday? It was easy.
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- I asked Sam NOT to tell me anything except the final number off his calculator. I said take the number of the month you were born, January = 1 , February = 2, …….. June = 6 , but don’t tell me.
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- Just multiply that number by 5 and add a 6 . ( 6*5 + 6 = 36).
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- Ok, now don’t tell me but multiply that number by 4 and add 9 ( 36*4 + 9 = 153).
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- Ok, now don’t tell me but multiply that number by 5 ( 153 * 5 = 765)
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- Now don’t tell me but add the number for the day you were born ( 765 + 4 = 769).
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- Ok , now tell me what is the number. He says 769. I subtract 165 ( 769 - 165 = 604) and I tell Sam based on the number you gave me, 769, I know you were born on June 4^th. ---------- 604 is June 4.
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- Always subtract 165 and you will get the right answer.
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- If you want to know why this always works let me know and I will tell you.