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how many solutions does the problem c*r*(a+f+t)=21 have if different letters represent different digits

Sagot :

Step-by-step explanation:

Factors of 21 are 1, 3, 7 and 21.

a + f + t cannot be 1 or 3 as it cannot be written as a sum of 3 distinct digits, so it is 7.

The smallest 3 remaining digits are 2, 5 and 6 which add to 13.

So there are no solutions.

Answer: 12

Step-by-step explanation:

21 = 21 x1 3x7

=1x3 expand over3= 12

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