What is the 4 digit number in which the 1st digit is 1/3 of the second, the 3rd is the sum of the 1st and 2nd, and the last is three times the second? Choose the correct choice from the following options:
A) 1100  B) 1134  C) 1349  D) 1430  E) 1490
First digit is 1/3 second digit =&gt; The numbers can be 1 &amp; 3, 2&amp; 6, 3 &amp; 9.   First + second = third =&gt; we can eliminate 3 &amp; 9 since  3 + 9= 
<gadget id="calculator"> 3 + 9</gadget>
<output>12</output>
12.   Last is 3 times the second=&gt; we can eliminate option 2 &amp; 6 since  3 * 6= 
<gadget id="calculator"> 3 * 6</gadget>
<output>18</output>
18.   Hence the number is 1349   1349
<result>C</result>
What is the 4 digit number in which the 1st digit is 1/3 of the second, the 3rd is the sum of the 1st and 2nd, and the last is three times the second?