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# Rational Number and Integer | PRMO 2019 | Question 9

Try this beautiful problem from the PRMO, 2019 based on Rational Number and Integer.

## Rational Number and Integer - PRMO 2019

let the rational number $$\frac{p}{q}$$ be closest to but not equal to $$\frac{22}{7}$$ among all rational numbers with denominator < 100, find p-3q.

• is 107
• is 14
• is 840
• cannot be determined from the given information

Rational number

Algebra

Integer

## Check the Answer

PRMO, 2019, Question 9

Higher Algebra by Hall and Knight

## Try with Hints

|$$\frac{22}{7}-\frac{p}{q}$$|=|$$\frac{22q-7p}{7q}$$| then |22q-7p|=1 for smallest value

and q=99 then p=311

p-3q=311-(3)(99)=311-297=14.

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Try this beautiful problem from the PRMO, 2019 based on Rational Number and Integer.

## Rational Number and Integer - PRMO 2019

let the rational number $$\frac{p}{q}$$ be closest to but not equal to $$\frac{22}{7}$$ among all rational numbers with denominator < 100, find p-3q.

• is 107
• is 14
• is 840
• cannot be determined from the given information

Rational number

Algebra

Integer

## Check the Answer

PRMO, 2019, Question 9

Higher Algebra by Hall and Knight

## Try with Hints

|$$\frac{22}{7}-\frac{p}{q}$$|=|$$\frac{22q-7p}{7q}$$| then |22q-7p|=1 for smallest value

and q=99 then p=311

p-3q=311-(3)(99)=311-297=14.

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