Math
posted by Nicholas
i am a four digit number. all of my digits are different. my first digit is twice my fourth digit. my second digit is twice my first digit.my last digit is twice my third digit. the sum of my digits is 15. what number am i?

MathMate
Let the fourth digit be x
First digit = 2x
Second digit = 2(2x) = 4x
Third digit = x/2
Thus x+2x+4x+x/2 = 15
15x/2=15
x=2
Thus the number is (2*2)(4*2)(2/2)(2)
= 4812 
gays
a four digit number equals the sum of twice of its reversed and half of it. also its first digit is 4 times the last digit and second digits is 7 times the 3rd digit .the sum of four digits of the number is ?

Anonymous
I am a four digit number with 6 hundreds and 5 ones .the sum of all my digits is 15 what am I.
Respond to this Question
Similar Questions

math
my thousand digit is half my ones digit.my houndreds digit is odd and divisable by three.the sum of my hundreds digit,tens digit and ones digit is the same as the sum of my hundreds digit and ones digit. the difference between my houndreds … 
Math
It is a 5 digit no. ,palindrome,divisible by 4,10 digit is cube root of 1 digit,product of 100 digit and 1 digit is 54 ,sum of hundred and ones digit is 15.what is the number? 
math
Find the fourdigit number described by these three clues. 1) The first digit is onethird of the third digit. 2) The fourth digit is twice the second digit. 3) The first and third digits add up to twice the sum of the second and fourth … 
math
Mrs. Rossi wrote the following clus for a mystery 4digit number. .The tens digit is twice the one digit .The hundreds digit is twice the ones digit. .The ones digit is 3. .The sum of the digits is 19. What is the mystery number? 
math
The number uses every number 09 the numbers are used only once the fourth digit is 4 the first digit in the billions place is 3 the 5 is next to the last digit the sixth digit is 7 the digit after 3 is 9 the digit before 5 is 2the … 
math
i am a 5 digit palindromic number. My third digit is 5 more than my fifth digit , my fourth digit is 2 times greater than my first digit. The sum of my digit is 14 What number am i? 
maths
Find the sum of all 3digit positive numbers N that satisfy the condition that the digit sum of N is 3 times the digit sum of N+3. Details and assumptions The digit sum of a number is the sum of all its digits. For example, 1123 has … 
math
this code has five digit 1,2,3,4,5. the first digit plus the second digit is equal to the third digit the second digit twice times the first digit the second digit is half the fourth digit and the fifth digit is the sum of the first … 
maths
what is the four digit number which satisfies these conditions; The last digit is twice the first digit. The second digit is twice the third digit. The sum of the first and last digits is twice the third digit. 
Math
It's a riddle question. All six digits in the number even remember that zero is an even number one digit is use once and all the other digits is used twice is four times the hundreds digit 10 digit is the difference of the ones digit …