AB and BA are 2-digits integers and AB*BA=CDE, where CDE is

Question

AB and BA are 2-digits integers and AB*BA=CDE, where CDE is a 3-digits integer. What is AB?
1). A=E
2). A=C

yezz · Answer

AB and BA are 2-digits integers and AB*BA=CDE, where CDE is a 3-digits integer. What is AB? 
1). A=E 
2). A=C

AB*
BA=
(AB) ( A^2+B^2) (AB) = CDE

THE ONLY USEFULL INFORMATION IS THE UNITS DIGIT OF THE PRODUCT IE: E = (AB)
 AND C COULD = (AB) AND THUS C =E =A OR C = (AB) + ANY REMAINDER FROM ( A^2+B^2)

FROM ONE


AB=E,A=E THUS B = 1 and no information can be deducted about A

FROM TWO

A = C NOT SUFF

TOGETHER STILL NOT SUFF

MY ANSWER IS E

EconGirl · Answer

Is it C?

from both 1) and 2) we get:

CB * BC = CDC

the only numbers I can think of fullfilling this condition are 11x11=121

MBAlad · Answer

OA is E

Both together still means that AB could still equal 11 or 21

haas_mba07 · Answer

Good job yezz... I went for C... did't bother to check for 11 x 11

AB and BA are 2-digits integers and AB*BA=CDE, where CDE is

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