What 5 digit number multiplied by 4 is itself backwards?

Originally Answered: A five digit number when multiplied by 4 gives a product which is in reverse order of number. What is the number? 21978 is the required number. 21978 is the required number.

What is the reverse of multiply by 4?

Thus when the entire number is multiplied by 4, the largest digit of the result is 4A = 8 which when reversed implies that D = 8.

What 6 digit number multiplied by 4 is itself backwards?

2178
To summarize, the only number that solves the puzzle is 2178. By a similar logic, we can find the six-digit number that when multiplied by 4 is equal to the original number with its digits in reverse order. Each of the intermediate carries must be 3, and so the number is 219978.

When a four-digit number is multiplied by 4 its digits appear in?

When a certain four-digit number is multiplied by 4 its digits appear in reverse order. It also has the following properties. It’s first digit is a quarter of the last one. And its second digit is one less than the first. “When a four-digit number is multiplied by 4 its digits appear in reverse order.”.

What is a 4 digit number less than 2500?

Since it’s 4 Digit Number and since after multiplication also it has to be a 4 Digit Number, it’s easy to see that the Number has to be less than 2500 since 2500 * 4 = 10000. The Number also can’t be starting with 1, as any Number when multiplied by 4, can’t result into an odd number.

Why can’t a number have a second digit of 0?

The Number can’t have second Digit as 0, so the second Digit has to be 1 or above. This is because if the last Digit is 8 and when 8 is multulied by 4 gives the carry of 3 and to make the next Digit (from right) as 0, some Digit when multiplied by 4 has to result into a number ending with 7, which is impossible.

How do you multiply 2 times a whole number?

The 2 multiplies through the whole four digit number starting in the ones place, then moving to the tens, hundreds and ending at the thousands. Start with 2 times 0 which equals 0 and place it in the ones place. Next is 2 times 5 which equals 10, place the 0 down below and carry over the 1. 2 times 3 is next which equals 6 plus the carried 1.