15
1 x 5 = 5, and 5 x 3 = 15
The Answer is 36 btw. 3 + 6 = 9 3 x 6 = 2(3x6) 2(18) = 36
A two digit number whose two digits added together equal 42 and multiplied together equal 82
The only way to produce 4 as a product of digits is to have either a '4'or else '2 x 2' among the digits, and ' 1 ' for all the rest of them.Possibilities that include a '4':1111411141114111411141111. . . . . . . . . 5 possibilitiesPossibilities that include a pair of 2s :11122112121211221112112211212121121122112121122111. . . . . . . . . 10 possibilitiesTotal = 5 + 10 = 15 possibilities
79
Two (or four) digits added together cannot equal 42. Two-digit numbers multiplied together cannot equal 82.
121
1
There are 15 of them.
29 2 * 9 = 18 2 + 9 = 11 18 - 11 = 7
21 and 20
The Answer is 36 btw. 3 + 6 = 9 3 x 6 = 2(3x6) 2(18) = 36
412
A two digit number whose two digits added together equal 42 and multiplied together equal 82
55 52+52 = 50
No. Take 12 for example. 1+2=3 but 1x2 doesn't equal 3, it equals 2.
Only if the final digit, after the decimal point, is zero.
1348.