Elitmus
Exam
Numerical Ability
Ratio and Proportion
What are the values of 3 integers a, b and c ? Statement 1: ab=8
statement 2:bc=9
Read Solution (Total 6)
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- ab=8
bc=9
a=8;b=1;c=9 - 7 years agoHelpfull: Yes(9) No(5)
- If ab=8, possible solutions are (a=1,b=8 ; a=2,b=4 ; a=4,b=2; a=8,b=1)
bc=9, possible solutions are (b=1,c=9 ; b=3=c ; b=9,c=1)
on;y common solution is a=8,b=1, c=9(Answer) - 7 years agoHelpfull: Yes(4) No(2)
- 1/ab=8 then b=1/8a-------- eq(1)
2/bc=9 then b=2/9c--------- eq(2)
eq(1)= eq(2)
1/8a=2/9c
we will get a=9,c=16
a's value we will put in eq(1)
now b=1/72 - 7 years agoHelpfull: Yes(2) No(16)
- factors of 8 : 1,2,4,8
factors of 9 : 1,3,9
common factor is 1 i.e value of b.
since b=1, then a=8 and c=9. - 6 years agoHelpfull: Yes(2) No(2)
- a=8
b=1
c=9 - 7 years agoHelpfull: Yes(0) No(5)
- 8,1,9
ab=8=2*2*2
bc=9=3*3 - 6 years agoHelpfull: Yes(0) No(1)
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