Call the digits a,b,c left-to-right
a = c/2
b+c = 7
b-a = 1
we see that c=2a, so
subtract to get
Thus c=4 and b=3
Or, just working with the specs,
c must be even, since it can be divided by 2. So, R is one of the forms
Since the last two add to 7, R must be
Answer this Question
Math - Determine the digits of Y from these clues. The digits of Y add to 18. ...
math - Find the four-digit number described by these three clues. 1) The first ...
math - Solve the mathematical puzzle. Determine the digits of F from these clues...
math - this code has five digit 1,2,3,4,5. the first digit plus the second digit...
math - Find a six-digit even number containing no zeros and no repeating digits ...
Math - i am a four digit number. all of my digits are different. my first digit ...
Math - A number has 4 digits. The sum of the first and last digit is twice the ...
Math - A number has four digits. the sum of the first and last digits is twice ...
math - use the clues to find the 7th digit mystery number. * Its is between 1 ...
math - use the clues to find the 7th digit mystery number. * it is between 7 and...