CAT Quantitative Ability Questions | CAT TIme, Speed, Distance and Work questions

CAT/2001

Question . 99

If 09/12/2001 happens to be Sunday, then 09/12/1971 would have been

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Explanatory Answer

Method of solving this CAT Quantitative Ability Question from TIme, Speed, Distance and Work question

(d) We know every year has 1 odd days and leap year has 2 odd days

Total number of years = 30

Here, no. of normal years = 22

And no. of leap years = 8

So, total no. of odd days between 9/ 12/ 71

and 9/ 12/ 2001 = 22 + 16 = 38

i.e., 3 odd days (remainder when 38 is divided by 7, i.e., 3)

Hence, it was a Thursday