Question

find the value of the letters CD+37=7C​

Answer 1

By assumption

CD+37=7C

7C will be between 70-79

then C will be 0-9

for obtaining 70 CD should be 33

similarly CD will be between 33-42

so C will be 3 or 4

if C is 3 then D will be 6

if C is 4 then D will be 7 .

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