Eleven plus two equals Nine

If eleven plus two equals one, what does nine plus five equal?




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He called the five members of the crew whom he suspected and asked them what they were doing for the last 15 minutes.

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A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
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The Detective was instantly able to find the murderer.
Can you?

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For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
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Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

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Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

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If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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What does a man do only once in his lifetime, but women do once a year after they are 29?

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