One guy had a habit of spending the money as per the day of the month, for example he will spend $18 on 18th of the month.
Once he spent, $63 in continuous 5 days, What could be the dates ?
What was the first day ?Click here to See Solution
lets assume all the days were of the same month, in that case
x + (x+1) + (x+2) + (x+3) + (x+4) = 63
5x = 53
x is coming out to be in decimal, which can not be
now the other possibility is such that month changes after some days
thus there can be few possibilities
A) x + (x+1) + (x+2) + (x+3) + 1 = 63
4x = 56 => x = 14, but 1st cant come after 17th, so it is ruled out
B) x + (x+1) + (x+2) + 1 + 2 = 63
3x = 57 => x = 19, but again 1st cant come after 21, so it is ruled out as well
C) x + (x+1) + 1 + 2 + 3 = 63
2x = 56 => x = 28, this is possible for the month with 29 days, i.e. February of leap year
so thee dates were 28,29,1,2,3