Question 1124877
Punctuation is a wonderful thing, you should try it.
:
The number has 4 digits.
10a + 1b + .1c + .01d is the number
:
 The number is less than 100.
 One of the digits is an odd number.
:
 The hundredths digit is the sum of the tens and the ones digit.
d = a + b
 The tens digit is three times the ones digit.
a = 3b
 The tenths digit is two times the ones digit.
c = 2b
:
Replace a with 3b in the 1st equation
d = 3b + b
d = 4b
Therefore, b can = only 1 or 2, 
If b = 1, then
a=3, c=2, d=4,: the number: 31.24
If b = 2, then
a=6, c=4, d=8: the number 62.48, all even numbers therefore
31.24 is the number