s = product 100 - 200
t = product 100-201
t= s*201
s=t/201
1/s + 1/t = (s+t)/st
(t/201 + t) / t^2/201 = (201t + t)/201 / t^2/201 = 202t/t^2 = 202/t.
Thus, D.
OA?
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Source: Beat The GMAT — Problem Solving |
Answer is D
LCM of s and t is t , ie product of numbers from 100 to 201
since s is the product of numbers from 100 to 200, when u take the LCM, it would be (201+1)/t ie 202/t
LCM of s and t is t , ie product of numbers from 100 to 201
since s is the product of numbers from 100 to 200, when u take the LCM, it would be (201+1)/t ie 202/t
