What is the four-digit number in which the first digit is 1/3 of the second,the third is the sum of the first and second, and the last is three times the second? Choose the correct choice from the following choices:
A) 1349
B) 1347
C) 1449
D) 2349
E) 1399
It is given that the first digit is 1/3 of the second. There are 3 such possibilities 1)1 and 3   2)2 and 6   3)3 and 9   Now, the third digit is the sum of the first and second digits.   1)1 + 3 = 4   2)2 + 6 = 8   3)3 + 9 = 12   It is clear that option 3 is not possible. So we are left with only two options.Also, the last digit is three times the second, which rules out the secondoption. Hence, the answer is 1349   1349NSWER:1349
<result>A</result>
What is the four-digit number in which the first digit is 1/3 of the second,the third is the sum of the first and second, and the last is three times the second?