42.21 or 84.42
None. The sum of one digit can't be twice the size of the digit.
It is 99,887,765
The units digit of a two digit number exceeds twice the tens digit by 1. Find the number if the sum of its digits is 10.
22621, 44742, 66863, 88984
For this type of problems, you basically assign digits from left to right, choosing the largest digit, in every case, that satisfies the requirements.
0.1 is 10% and 0.25 is 25%...Do you see a pattern? Your tenths place and hundredths place make up the first two digits of a percent. (in 0.25: 2 is the tenths and 5 is the hundredths) So if you have any digits after the hundredths place, they'll go after the decimal point in the percent. Ex. 0.5838 = 58.38% 1.904 = 190.4% Basically, you move the decimal point twice to the right and put a % at the end of it! ***for any further question email me at firstname.lastname@example.org
22621, 44742, 66863, 88984
18 is the only number that matches these criteria.
2,241 because you double the digits
5*4*3*2 = 120
As no digit is used twice then you have 4 choices for the first digit, but only 3 choices for the 2nd digit, 2 for the 3rd and just one for the 4th. 4 x 3 x 2 x 1 = 24 combinations.
47 Impossible problem!
Only one . . . . . 18
Assuming that the first digit of the 4 digit number cannot be 0, then there are 9 possible digits for the first of the four. Also assuming that each digit does not need to be unique, then the next three digits of the four can have 10 possible for each. That results in 9x10x10x10 = 9000 possible 4 digit numbers. If, however, you can not use the same number twice in completing the 4 digit number, and the first digit cannot be 0, then the result is 9x9x8x7 = 4536 possible 4 digit numbers. If the 4 digit number can start with 0, then there are 10,000 possible 4 digit numbers. If the 4 digit number can start with 0, and you cannot use any number twice, then the result is 10x9x8x7 = 5040 possilbe 4 digit numbers.
Repeated twice means we're allowed three of them. That would be 88,866,644. If you really meant repeated, that would be 88,664,420
If the number is odd, the last digit is odd. That means the ten's digit must be twice the one's digit. There are only four two-digit numbers where the ten's digit is twice the one's digit: 21, 42, 63, 84. Check which of these satisfy all the clues.
I'm greater than one million but less than ten million im an even number none of my digits are less than three no digit is used more than once the sum of the digits in the ones period is twelve the digit in the ten thousands place is equal to the sum of the digits in the tens an hundreds places the digit in the millions place is two more than the digit in the thousands place the digit in the hundred thousands place is twice the digit in the tens place what is the mystery number?
9630 of them. 10 have all four digits the same and 360 have 3 of one and 1 of another.