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A sheet of paper has statements numbered from 1 to 20. For each value of n from 1 to 20, statements n says ‘At least n of the statements on this sheet are true.’ Which statements are true and which are false?
8) The odd numbered statements are true and the even numbered are false.
9) The first 13 statements are false and the rest are true.
10) The first 6 statements are true and the rest are false.
11) The even numbered statements are true and the odd numbered are false.

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TCS Other Question

How many 9 digit numbers are possible by using the digits 1,2,3,4,5, which are divisible by 4 if repetition of digits is allowed? a lady had fine gloves and hats. 25 blue,7 red and 9 grey. she had to select a pair among them. but there was no light so she had to select in the darkness the correct pair with glove and hat. how many combinations of same color she can select?