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Question

If 20th September in a year is Wednesday, the number of Fridays in the same month is


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Solution

Step 1: Find Friday after 20thSeptember .

Given: 20thSeptember is Wednesday.

Friday after 20th will be on =20+2

Friday after 20th will be on =22th September

Friday after 22th will be on =22+7

Friday after 22th will be on =29th September

Step 2: Find Friday before 20th September.

Friday before 20th will be on =22-7

Friday before 20th will be on =15thSeptember

Friday before 15th will be on =15-7

Friday before 15th will be on =8thSeptember

Friday before 8th will be on =8-7

Friday before 8th will be on =1thSeptember

Therefore, 1st,8th,15th,29th, 22th September is a Friday.

Hence, total number of Fridays in the September month is 5.


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