When a number is added to its next number and another number that is 3 times its next number, the sum of these three numbers is 64. Find the number.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 12.
Let the number be x.
Next number = x + 1
According to the question;
x + x + 1 + 3(x + 1) = 64
5x + 4 = 64
5x = 60
x =12
Hence, the number is 12.