C-12-Q092mediumsingle_mcq

The units digit of a two-digit number is $1$ more than thrice the tens digit, and the interchanged number equals $8$ times the sum of the digits. The original number is —

a $27$
b $13$
c $72$
d $31$

ব্যাখ্যা

The conditions give $y = 3x + 1$ and $10y + x = 8(x + y)$ , which simplifies to $2y = 7x$ . Solving these together yields $x = 2$ , $y = 7$ , so the number is $27$ .

এই অধ্যায়ের আরও প্রশ্ন

C-12-Q093The difference of the digits of a two-digit number is and the sum of the number and its digit-reversal is . Th
C-12-Q094The sum of two numbers is and their difference is . The larger number is —
C-12-Q095The sum of two numbers is and their difference is . The smaller number is —
C-12-Q096In Example 13, the present age of the father is —
C-12-Q097In Example 13, the present age of the son is —
C-12-Q098Let mother's present age be and the sum of her two daughters' ages be . From the condition "mother's age is fo
C-12-Q099" years ago, father's age was times son's age" gives — ( = father's, = son's present age)
C-12-Q100"After years, father's age will be twice son's age" gives —
C-12-Q101If the numerator of a fraction is and denominator is , the fraction is —
C-12-Q102"If is added to numerator and denominator each, the fraction becomes " gives the equation —

Simple Simultaneous Equations in Two Variables — সব প্রশ্ন দেখুন (152টি) →

The units digit of a two-digit number is 111 more than thrice the tens digit, and the interchanged number equals 888 times the sum of the digits. The original number is —

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

The units digit of a two-digit number is 111 more than thrice the tens digit, and the interchanged number equals 888 times the sum of the digits. The original number is —

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

The units digit of a two-digit number is $1$ more than thrice the tens digit, and the interchanged number equals $8$ times the sum of the digits. The original number is —

The units digit of a two-digit number is $1$ more than thrice the tens digit, and the interchanged number equals $8$ times the sum of the digits. The original number is —