Some equations are solved on the basis of a certain system. Find the correct answer for the unsolved equation on that basis.
`58 xx 12 = 4, 37 xx 96 = 5,`
`11 xx 20 = 2, 42 xx 12 = ? `

Options

A. 2
B. 3
C. 4
D. 5

Answer

B

Explanation

`58xx12=4`
`implies(5+8)+(1+2)implies4`
`implies13+3implies4impliessqrt(16)=4`
`37xx96=5`
`implies(3+7)+(9+6)implies5`
`implies10+15implies5impliessqrt(25)=5`
`11xx20=2`
`implies2+2implies2`
`impliessqrt4=2`
`42xx12`
`implies(4+2)+(1+2)`
`6+3=9`
`impliessqrt9=3`