The first digit of a two-digit number is 4 more than the second, and their product is 21. Find the two-digit number
| January 13, 2021 | education
Since the number is two-digit, then it consists of single-digit numbers.
Consider the product of numbers 21. Let us decompose it into prime factors.
3 * 7 = 21
Let’s move on to the first condition and check if it holds for our found numbers.
7 – 3 = 4.
Answer: 73
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