Answer-If the 5-digit number 505xy is divisible by 11 and 21, then what is the value of (7x – 5y)?

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Answer-If the 5-digit number 505xy is divisible by 11 and 21, then what is the value of (7x &ndash; 5y)?

Accepted Answer

LCM 11, 21  231 By taking the largest 5-digit number 50599 and divide it by 231. 50599  231divisor x 219Quotient  10rem 50599  50589  10 50599-10  50589 completely divisible by 231 50589  505xy where x  8, y  9 Now the value of 7x - 5y, 7x5y  7x8-5x9 56-45  11 The value of 7x - 5y is 11.

If the 5-digit number 505xy is divisible by 11 and 21, then what is the value of (7x – 5y)?

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