They add up to 9
The sum of the digits of a number often reveals patterns, such as divisibility rules. For example, a number is divisible by 3 if the sum of its digits is divisible by 3. Additionally, the sum can provide insights into the number's properties, such as whether it is odd or even. Observing the sum of digits can also help identify sequences or trends in larger datasets.
There are two numbers that satisfy the criteria. 38 and 83
It can have up to 5 digits.
81
When using significant digits, the product has only the number of significant digits as the lowest number in the factors. "20" has two significant digits and "310" has three. Therefore, the product has to have two significant digits. 310 × 20 = 6200 6200 already has two significant digits.
52 is a number whose digits have a product of 10.
88
19
There are two numbers that satisfy the criteria. 38 and 83
It can have up to 5 digits.
81
digits
When using significant digits, the product has only the number of significant digits as the lowest number in the factors. "20" has two significant digits and "310" has three. Therefore, the product has to have two significant digits. 310 × 20 = 6200 6200 already has two significant digits.
-10
The number is 83.
The 2-digit number must be 20, because it is the only 2-digit number whose sum of its two even digits, 2 + 0 = 2, is greater than the product of its two even digits, 2 x 0 = 0. Moreover, 20 is a product of the two consecutive integers 4 and 5.
1