I have encountered a GRE question: compare 33333 times 5555555 vs 55555 times 3333333.
How do we compare such type of questions?
33333 x 5555555 = (3 x 11111) x (5 x 1111111) = 15 x 11111 x 1111111
55555 x 3333333 = (5 x 11111) x (3 x 1111111) = 15 x 11111 x 1111111
These huge numbers for QC always have a trick for comparison, we never have to do the actual math. Finding that what works is what comes with practice.
Make a toy problem
3 x 55 = 165 , 5x33=165 [EQUAL]
33x555 =18315, 55x333=18315 [EQUAL]
333x5555=1849815, 555x3333=1849815 [EQUAL]
To know why this work see the above explanation by @C.Koushik
1 Like