let this integer be (xy)
(xy) = 10x + y
10x+y = 2.x.y
10x + y - 2xy = 0
2x.(5-y) +y= 0
x= y / 2(y-5)
when the integer provides this condition, it is equal to twice the product of its digits.
And there is such only one integer.
36
They are: 1*2*3 = 6
There are 192.
420
456, 546 and 564 are three of the four possible even numbers.
6 if all digits are different, 27 otherwise.
They are: 1*2*3 = 6
There are 192.
420
456, 546 and 564 are three of the four possible even numbers.
6 if all digits are different, 27 otherwise.
To find the fraction of 4-digit natural numbers with a product of their digits that is even, we first need to determine the total number of 4-digit natural numbers. There are 9000 such numbers (from 1000 to 9999). Next, we consider the conditions for the product of digits to be even. For a number to have an even product of digits, at least one of the digits must be even. There are 5 even digits (0, 2, 4, 6, 8) and 5 odd digits (1, 3, 5, 7, 9). Therefore, the fraction of 4-digit natural numbers with an even product of digits is 5/10 * 9/10 * 9/10 * 9/10 = 3645/9000 = 809/2000.
You can make 24 numbers by rearranging the digits. However, you can make vastly more if you allow mathematical operations on the digits. For example, 3+5*8-6 = 37.
The prime numbers 2 and 3 have 6 as their product when multiplied.
Without repeating digits (not digets!) and without leading 0s, 600 of them.
1,956 different numbers can be made from 6 digits. You can calculate this by using the permutation function in a summation function, like this: Σ6k=1 6Pk = 6P1+6P2+...+6P5+6P6 What this does is calculate how many 1 digit numbers you can make from 6 digits, then how many 2 digit numbers can be made from 6 digits and adds the amounts together, then calculates how many 3 digit numbers can be made and adds that on as well etc.
Using the digits, we can make 81 x 62 equals 5022, which is the largest possible product.
Count the numbers of digits after the decimal points (DP) in the two numbers.Add these numbers together.Calculate the product, including any trailing 0s.Place the DP so that the number of digits after the DP is the same as the sum of the digits after the DP (step 2).Thus, for 15.38 * 0.0045The first number has 2 digits after the DP, the second has 4, so sum of digits after DP is 2+4 = 6.1538*0045 = 69210.The answer must have 6 digits after the DP so you need to insert a 0 after the DP to make it .069210 which can then be simplified to .06921