C-05-Q147mediumsingle_mcq

In question 146, the number obtained by interchanging the digits is—

a $3x$
b $4x$
c $12x$
d $21x$

ব্যাখ্যা

Interchanging the digits puts $x$ in the tens place and $2x$ in the units place, giving $10x+2x=12x$ . This is the reversed counterpart of the original $21x$ .

এই অধ্যায়ের আরও প্রশ্ন

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Equations in One Variable — সব প্রশ্ন দেখুন (170টি) →