Table of Contents

- 1 What does it mean to interchange digits?
- 2 When the digits of two-digit numbers are reversed the number increases by 27 the sum of such two-digit numbers?
- 3 How do you switch the first and last digit of a number in Python?
- 4 How do you find the first digit of a number?
- 5 How do you swap the first and last digit in JavaScript?

## What does it mean to interchange digits?

Interchanging Of Digits Problems The sum of the digits of a two-digit number is 11. If we interchange the digits then the new number formed is 45 less than the original. Find the original number.

**What is the leftmost digit of a number called?**

Answer: The leftmost digit is called the most-significant digit (MSD). The rightmost digit is called the least-significant digit (LSD). Digital systems use binary digits with a binary radix.

**How do you interchange digits in a number?**

Algorithm to swap first and last digit of a number:

- Ask the user to enter an integer number. Suppose n = 12345, where n is an integer variable.
- To find the last digit of a number, we use modulo operator \%.
- Find the first digit with the help of mathematical operation.
- Use below logic to swap first and the last digit.

### When the digits of two-digit numbers are reversed the number increases by 27 the sum of such two-digit numbers?

So the number is 10*a + b. The digits are reversed when 27 is added to it. Therefore for all the numbers 14 , 25 , 36 , 47 , 58 and 69 the digits are reversed when 27 is added.

**How do you find the last two digits of a number?**

Last two digits of a number is basically the tens place and units place digit of that number. So given a number say 1439, the last two digits of this number are 3 and 9, which is pretty straight forward.

**How do you find the last digit of a modular arithmetic?**

Modular Arithmetic Finding the last digit of a number is the same as finding the remainder when this number is divided by 10. In general, the last digit of a power in base n is its remainder upon division by n. So, for decimal numbers, we compute mod 10 to find the last digit, mod 100 to find the last two digits, etc.

## How do you switch the first and last digit of a number in Python?

Python Program to Swap the First and Last Value of a List

- Take the number of elements in the list and store it in a variable.
- Accept the values into the list using a for loop and insert them into the list.
- Using a temporary variable, switch the first and last element in the list.
- Print the newly formed list.
- Exit.

**What is the last number?**

A googol is the large number 10100. In decimal notation, it is written as the digit 1 followed by one hundred zeroes: 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000.

**What is the last digit of a number?**

Finding the last digit of a number is the same as finding the remainder when this number is divided by 10. In general, the last digit of a power in base n is its remainder upon division by n. So, for decimal numbers, we compute mod 10 to find the last digit, mod 100 to find the last two digits, etc.

### How do you find the first digit of a number?

To find first digit of a number we divide the given number by 10 until number is greater than 10. At the end we are left with the first digit. echo firstDigit ($n) . ” ” . Important note: log10 () is a mathematical function present in math.h header file.

**What is the smallest possible number with a value of 2?**

This results in the 17 digit value b = 10,526,315,789,473,684 which leads to the 18-digit number 105,263,157,894,736,842. Thus a = 2 is the smallest possible value, and it gives the 18 digit solution 105,263,157,894,736,842. Incidentally, notice we cared about numbers that were divisible by 19.

**How to find last digit of a number using modulo?**

To find last digit of a number, we use modulo operator \%. When modulo divided by 10 returns its last digit. Suppose if n = 1234 then last Digit = n \% 10 => 4

## How do you swap the first and last digit in JavaScript?

Logic to swap first and last digit of a number Begin: read(num) lastDigit ← num \% 10; digits ← log10(num); firstDigit ← num / pow(10, digits); swappedNum ← lastDigit * pow(10, digits); swappedNum ← swappedNum + num \% pow(10, digits); swappedNum ← swappedNum – lastDigit; swappedNum ← swappedNum + firstDigit; End.