Answer:
192 is the 3rd number that was missing.
Step-by-step explanation:
The first number = 131
The 2nd number = 517
The 3rd number = ?
The fourth number = 123
So, numbers are given as : 131, 517, ?, 123
Looking carefully, we can observe that the numbers are in three digits.
Lets try these numbers and rewrite in two digits to find the missing 3rd number.
Rewriting 131, 517, ?, 123 in two digits : 13, 15, 17, 19, 21, 23
The pattern gives us an idea that if we again rewrite 13, 15, 17, 19, 21, 23 in a sequence in three digits, we would be able to find the missing 3rd number.
So, 13, 15, 17, 19, 21, 23 in three digits : 131, 517, 192, 123
So, 192 is the 3rd number that was missing.
Keywords: number, digit
Learn more about missing number in a sequence from brainly.com/question/14289349
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