SSC Government Jobs Exams Numerical Ability LCM and HCF

LCM of two prime numbers x and y(x>y)is 161.The value 3y-x is :
(a)-2
(b)-1
(c)1
(d)2

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SSC Other Question

a loss of 17% is converted to a profit of 25% when selling price is increased by 1662.what is the cp? and sp?

A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?
A. Rs. 4991 B. Rs. 5991
C. Rs. 6001 D. Rs. 6991