They are: 1*2*3 = 6
123
There are 15 of them.
Numbers whose product is one is called multiplicative inverses.
Any two numbers whose product is '1' are each others' reciprocals.
There are no 3-digit whole numbers whose digits sum to 3. The smallest 3-digit number is 100, and the largest is 999, but in neither case is the sum of the digits equal to 3.
123
There are 15 of them.
Forming three three digit numbers that use the numbers 1-9 without repeating, the highest product possible is 611,721,516. This is formed from the numbers 941, 852, and 763.
-21
52 is a number whose digits have a product of 10.
They are numbers, only some of whose digits are known.
Numbers whose product is one is called multiplicative inverses.
6
There are 5460 five digit numbers with a digit sum of 22.
two prime numbers whose product is 141 = 3 & 47
3 and 7 are prime numbers whose product is 21.
There are no 3-digit whole numbers whose digits sum to 3. The smallest 3-digit number is 100, and the largest is 999, but in neither case is the sum of the digits equal to 3.