# Mystery number

A mystery number is between 800 and 920. No digits are the same. The difference of the number is 5. What is the mystery number?

**Result****Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):**

**Showing 1 comment:**

**Dr Math**

The difference of the number is 5 - we calculate difference between digits is 5....

#### Following knowledge from mathematics are needed to solve this word math problem:

## Next similar math problems:

- Unknown number 22

I am a two-digit number. My tens digits is 4. My ones digit is 3 more than my tens. Who am I? - No. 215

From the number 215 we can create a four-digit number that among its numbers manually type any other digit. Thus, we created two four-digit numbers whose difference is 120. What two four-digit numbers that might be? - What is missing (1000)

What number is to add to get 1000? - Written number

Place+values x ten thousands =30 thousands - Bus

On the 4-th stop take on 56 and take off 38 passengers. How many were added (write as positive number) or shrunk (write as negative number) the count of passengers? - Three numbers

How much we increases the sum of three numbers when the first enlarge by 14, second by 15 and third by 16? Choose any three two-digit numbers and prove results. - Identity

123456789 = 100 Use only three plus or minus characters to correct previous identity/equation. - Roman numerals

Write numbers written in Roman numerals as decimal. - Fedor

Fedor stood in the small pool. Above the surface was a part of his body that was twice as long as part of his body underwater. What height does Fedor have, if his body part below the surface is 5 dm long? - Mom and dad

Mom wants talk with dad 2.2 hours. But dad wants of 2 times more hours than mom ... How many hours wants dad talk with mom? ... - Snacks

The school attends 344 pupils. Half of them take snacks. 13 pupils who took snacks did not attend school. How many snacks left? - Carpenter

You want to cut long board into smaller pieces. Carpenter said that one cut of the board into two pieces will cost you 70 cents. But you need to cut the board into 9 parts. How much you pay? - School marks

Boris has a total of 22 marks. Ones have 3 times less than threes. There are two twos. How many has ones and threes? - Bus 2

On the 6-th stop 44 passengers take off from bus. Overall, the 6-th stop 13 passengers were added. How many passengers take on 6-th stop? - Hotel

The rooms in the mountain hotel are double and triple. Double rooms are 25 and triple are 17 more. How many rooms are there in this hotel? - Postal stamps

Jano and Peter exchanged postal stamps. Jano gave Peter 32 stamps of the missile for 8 stamps with turtles. How good was Jano after this exchange (how many he has surplus in exchanged stamps)? - Computer

A line of print on a computer contains 64 characters (letters, spacers or other chars). Find how many characters there are in 7 lines.