Ans.9

9.A sheet of paper has statements numbered from 1 to 40. For all values of n from 1 to 40, statement n says: 'Exactly n of the statements on this sheet are false.' Which statements are true and which are false?

a.The 39th statement is true and the rest are false.
b.The odd numbered statements are true and the even numbered statements are false.
c.The even numbered statements are true and the odd numbered statements are false.
d. All the statements are false.


Solution:Answer is A.
Because last statement which is "exactly 40 statements are false" is true statement.
therefore 39th statement which contains exactly 39 statements are false is true.