How to calculate sum of digits of a given number?
General Algorithm for sum of digits in a given number: Get the number Declare a variable to store the sum and set it to 0 Repeat the next two steps till the number is not 0 Get the rightmost digit of the number with help of remainder ‘%’ operator by dividing it with 10 and add it to sum. Divide the
How to get the rightmost digit of a number?
Get the rightmost digit of the number with help of the remainder ‘%’ operator by dividing it by 10 and add it to sum. Divide the number by 10 with help of ‘/’ operator to remove the rightmost digit.
How to find the last digit of a number?
1 Add another variable “Val” to the function and initialize it to ( val = 0 ) 2 On every call to the function add the mod value (n%10) to the variable as “ (n%10)+val” which is the last digit in n. 3 So on the First call it will have the last digit. As we are passing n/10 as n, It follows until n is reduced to a single digit.
Can a number have all of its digits be non-zero?
First of all, let’s observe that all of the digits of such a number cannot be the same. You can just manually check that numbers $1111$, $2222$ and so on don’t suit us. It is also clear that all of the digits should be non-zero. Now suppose that we have such a number.
Which is an example of a 3 digit number?
There are just four 3-digit numbers which are the sums of the cubes of their digits. For example: 370 = 3 3 + 7 3 + 0 3 and 371 = 3 3 + 7 3 + 1 3.
How to get the sum of cubes up to 1000?
To get the sum of cubes up to 1000 we need a 9, two 8 s, one 8 plus two 7 s, or three 7 s. We can check that 1, 7, 7, 7 and 1, 7, 7, 8 fail. With two 8 s we have 1 3 + 2 ⋅ 8 3 = 1025 and all the possibilities fail. Then 1 3 + 9 3 = 730 We need another digit to be at least 4 to get up to 1000.
Is the smallest number expressible as the sum of two cubes?
“No,” he replied, “it is a very interesting number; it is the smallest number expressible as the sum of two cubes in two different ways.”