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Maths Puzzle
What day of the week was 1 february 1901?
Read Solution (Total 4)
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- 1900=(1600-0 odd days,300-1 odd days)
jan+feb=31+1,
32/7= 4 odd days
total=5 odd days
ANS=FRIDAY
- 12 years agoHelpfull: Yes(9) No(1)
- 1 Feb 1901 = (1900 years + 31-jan-1901 + 1-Feb-1901)
We know that number of odd days in 400 years = 0
Hence the number of odd days in 1600 years = 0 (Since 1600 is a perfect multiple of 400)
Number of odd days in the period 1601-1900
= Number of odd days in 300 years
= 5 x 3 = 15 = 1
(As we can reduce perfect multiples of 7 from odd days without affecting anything)
1-Feb-1901 = 31+1 = 32 (divided by 7 ) and remaining = 4 odd day
Total number of odd days = (0 + 1 + 4) = 5
5 odd days = Friday
Hence 1 February 1901 is Friday. - 12 years agoHelpfull: Yes(2) No(0)
- 1901->1600+300+01
1600->0
300->1
01->1 so 3 odd days...ans tuesday - 12 years agoHelpfull: Yes(0) No(6)
- 1900=1600+300
1600-0odd days
300-4odd days
jan+feb=4odd days
total=8 or 1odd days
so monday - 12 years agoHelpfull: Yes(0) No(3)
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