1. If we write the dates with numbers exclusively, the firstof January 1999 can

Question

1. If we write the dates with numbers exclusively, the firstof January 1999 can be written as 1.1.1999. This date has theproperty that a string of identical digits (in this case ones) isfollowed by a second string of identical digits (in this casenines), and nothing else. If x is the number of such dates in 1999and y the number of such dates in 2000, the value of X x Yis a. 0   b. 2   c. 4    d.6     e. 8 1. If we write the dates with numbers exclusively, the firstof January 1999 can be written as 1.1.1999. This date has theproperty that a string of identical digits (in this case ones) isfollowed by a second string of identical digits (in this casenines), and nothing else. If x is the number of such dates in 1999and y the number of such dates in 2000, the value of X x Yis a. 0   b. 2   c. 4    d.6     e. 8

Explanation / Answer

In 1999, we have 1.1.1999, 1.11.1999, 11.1.1199, and 11.11.1999, sox=4 in 2000, we have 2.2.2000, 2.22.2000, so y=2 thus, x*y = 4*2 = 8

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