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Math problem: The sum of dividend, divisor, quotient and remainder is 77, the known quotient is 9 and the remainder is 4. What is the divisor?
Solution: Because dividend = divisor x quotient+remainder =9 divisor +4.

Dividend+Divider+Quotient+Remainder =77

So 9 divisor +4+ divisor +9+4=77.

10 divisor =60

Frequency divider =6.