Arrange the digit 1,2,3,4,5,6,7,8,9 into three groups. make one group of two digits, one group of three digits, and one group of four digits. When you multiply the first group of digits by the second group of 3 digits you get the four digit number as your
read more .. Aug 27, 2020
+310 There are 10 numbers, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. If 1, 2, 3, 4, 5 have to be in that order, 6, 7, 8 have to be in that order, and 9, 10 have to be in that order, how many ways are there to arrange the ten numbers?
+109