CTET 2 Math and Science Sep 2014 Paper

Question : 36 of 120

Marks: +1, -0

LCM of two prime numbers x and y, (x > y), is 161. The value of 3y – x is

Solution:

LCM of two prime numbers x and y

=161

=7×23

Given that

x > y

x=23

y=7

Now

3y-x=3×7-23=-2

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