Thursday 25 December 2014

Smallest Number



          What is the smallest number which when divided by 10 leaves a remainder of 9, when divided by 9 leaves a remainder of 8, when divided by 8 leaves a remainder of 7 and so on until when divided by 2 leaves a remainder of 1?

Answer:     The number must be in the form:

 N = Rk -1 , where R is the least common multiple of 2,3,4,5,6,7,8  and 9.
K=  1,2,3,4,………
R = 2520
N = 2520  -1 ; N= 2519

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