Step1: Choose a large number of six or seven digits.
Step2: Take the sum of digits.
Step3: Subtract sum of digits from any number chosen.
Step4: Mix up the digits of resulting number.
Step5: Add 25 to it.
Step6: Cross out any one digit except zero.
Step7: Tell the sum of the digits. Subtract the sum of the digits from 25.
Step2: Take the sum of digits.
Step3: Subtract sum of digits from any number chosen.
Step4: Mix up the digits of resulting number.
Step5: Add 25 to it.
Step6: Cross out any one digit except zero.
Step7: Tell the sum of the digits. Subtract the sum of the digits from 25.
Answer: Inorder to find out the missing digit, subtract the sum of digits from 25. The difference is the missing digit.
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