Since all digits are different, the answer is 4! (read this as: 4 factorial), which is equal to 1 x 2 x 3 x 4.
When rounded to ten significant figures, the first ten digits of pi are: 3.141592654 The product of these digits is: 3 x 1 x 4 x 1 x 5 x 9 x 2 x 6 x 5 x 4 = 129600 Notwithstanding the eleventh digit of the number, which rounds the tenth digit 3 up to 4, the first ten digits of pi with 3 as the final number would be: 3 x 1 x 4 x 1 x 5 x 9 x 2 x 6 x 5 x 3 = 97200
Call this number "x", equal to 0.166166166... 1000x = 166.166166166... x = 0.166166166... Subtract the second equation from the first, you get: 999x = 166 Solving for x: x = 166/999. Note: I multiplied by 1000, because three digits are repeating (and 1000 has 3 digits).
-123456786
3 x 3 x 3 x 3 = 81. 4^3= 64. So no, they are not equal.
15 1 x 5 = 5, and 5 x 3 = 15
Since all digits are different, the answer is 4! (read this as: 4 factorial), which is equal to 1 x 2 x 3 x 4.
Assuming that the first digit can't be zero: If repetition of digits is permitted: (5 x 6 x 6) = 180 numbers of 3 digits. If repetition of digits is not permitted: (5 x 5 x 4) = 100 numbers of 3 digits.
423
32.
513 is divisible by 3 because the sum of its digits is a multiple of 3. 171 is divisible by 3 because the sum of its digits is a multiple of 3. 57 is divisible by 3 because the sum of its digits is a multiple of 3. 3 x 3 x 3 x 19 = 513
One solution is : [9/3 x 8/2 x 7 x 6 X 4] + 1 - 5 = [3 X 4 X 7 X 6 X 4] - 4 = 2016 - 4 = 2012
When rounded to ten significant figures, the first ten digits of pi are: 3.141592654 The product of these digits is: 3 x 1 x 4 x 1 x 5 x 9 x 2 x 6 x 5 x 4 = 129600 Notwithstanding the eleventh digit of the number, which rounds the tenth digit 3 up to 4, the first ten digits of pi with 3 as the final number would be: 3 x 1 x 4 x 1 x 5 x 9 x 2 x 6 x 5 x 3 = 97200
423
Call this number "x", equal to 0.166166166... 1000x = 166.166166166... x = 0.166166166... Subtract the second equation from the first, you get: 999x = 166 Solving for x: x = 166/999. Note: I multiplied by 1000, because three digits are repeating (and 1000 has 3 digits).
-123456786
3 x 3 x 3 x 3 = 81. 4^3= 64. So no, they are not equal.