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If a month is having four Sundays then what is the first day of the next month?
If month has 28 days i.e. 4 complete weeks: The month could start on any day, there will be exactly 4 Sundays. Thus, the month could end on any weekday. And the first day of the next month could be any week-day.
If the month has 29 days i.e. 4 complete weeks and 1 odd day: The month could start on ANY day EXCEPT Sunday (else it will have 5 Sundays). Thus, the next month could star on ANY day EXCEPT Monday.
If the month has 30 days i.e. 4 complete weeks and 2 odd days: The month could start on ANY day EXCEPT Saturday or Sunday (else it will have 5 Sundays). Thus, the next month could start on ANY day EXCEPT Monday or Tuesday.
If the month has 31 days i.e. 4 complete weeks and 3 odd days: The month could start on ANY day EXCEPT Friday, Saturday or Sunday (else it will have 5 Sundays). Thus, the next month could start on ANY day EXCEPT Monday or Tuesday or Wednesday.

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TCS Other Question
A lady has fine gloves and hats in her closet - 25 blue, 7 red, and 9 yellow. The lights are out and it is totally dark. In spite of the darkness, she can make out the difference between a hat and a glove. She takes out an item out of the closet only if she is sure that if it is a glove. How many gloves must she take out to make sure she has a pair of each color ?
 A& B completed a work together in 5 days. A worked at twice the speed and B at half the speed it would have taken then 4 days to complete the job. How much time would it take for A alone to do the job?
option
a) 25
b) 10
c) 20
d) 15