Advertisements
Advertisements
प्रश्न
The sum of a two-digit number and the number obtained by reversing the digits is always divisible by ______.
Advertisements
उत्तर
The sum of a two-digit number and the number obtained by reversing the digits is always divisible by 11.
Explanation:
Let ab be any two-digit number, then the number obtained by reversing its digits is ba.
Now, ab + ba = (10a + b) + (10b + a)
= 11a + 11b
= 11(a + b)
Hence, ab + ba is always divisible by 11 and (a + b).
APPEARS IN
संबंधित प्रश्न
Given an example of a number which is divisible by 2 but not by 4.
Given an example of a number which is divisible by 3 but not by 6.
Given an example of a number which is divisible by 4 but not by 8.
Which of the following statement is true?
If a number exactly divides the sum of two numbers, it must exactly divide the numbers separately.
Now you try and change these numbers into special numbers —
28
If 5A × A = 399, then the value of A is ______.
Number 7N + 1 will leave remainder 1 when divided by 7.
If a number a is divisible by b, then it must be divisible by each factor of b.
If 56 × 32y is divisible by 18, find the least value of y.
Fill in the blank space in the same way.
