First digit can be any of the 4 numbers, second can be any of the unused three etc so 4 x 3 x 2 x 1 = 24 different numbers.
256
975
0.0588
The answer is 3*3*2*1 = 18. If the leading digit is 0 it is not a 4-digit number.
Yes; by the definition of an irrational number (a number with an infinite amount of changing decimal digits as the number grows minutely larger), the converse is true about rational numbers a rational number like (1/3) [0.33333333...] can be notated with a bar over any of the digits to notate a repeating decimal digit.
256
987652431
98765
975
-58264
86420
4 x 3 x 2 ie 24
0.0588
The answer is 3*3*2*1 = 18. If the leading digit is 0 it is not a 4-digit number.
Yes; by the definition of an irrational number (a number with an infinite amount of changing decimal digits as the number grows minutely larger), the converse is true about rational numbers a rational number like (1/3) [0.33333333...] can be notated with a bar over any of the digits to notate a repeating decimal digit.
9,876,543
73 is the largest two-digit number that is prime and has prime numbers for both of its digits.