C-12-Q091mediumsingle_mcq

The sum of digits of a two-digit number is $7$ and on interchanging the digits the new number exceeds the original by $9$ . The number is —

a $25$
b $34$
c $43$
d $52$

ব্যাখ্যা

Let the digits be $x$ (tens) and $y$ (units): $x + y = 7$ and $(10y + x) - (10x + y) = 9 \Rightarrow y - x = 1$ . Solving gives $x = 3$ , $y = 4$ , so the number is $34$ .

এই অধ্যায়ের আরও প্রশ্ন

C-12-Q092The units digit of a two-digit number is more than thrice the tens digit, and the interchanged number equals t
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 —

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

The sum of digits of a two-digit number is 777 and on interchanging the digits the new number exceeds the original by 999. The number is —

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

The sum of digits of a two-digit number is 777 and on interchanging the digits the new number exceeds the original by 999. The number is —

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

The sum of digits of a two-digit number is $7$ and on interchanging the digits the new number exceeds the original by $9$ . The number is —

The sum of digits of a two-digit number is $7$ and on interchanging the digits the new number exceeds the original by $9$ . The number is —