Fractions

Tested in 4 real MPSC questions across 2 years (2015–2019). See it in context on the interactive Concept Graph →

Years it was asked

2019 2015

What you need to know first

LCM calculationFraction additionFraction multiplicationBasic algebraDecimal to fraction conversionBasic arithmetic

What mastering this unlocks

Algebra Ratio and proportion Arithmetic Word Problems PartnershipWeighted AveragesBasic ProbabilityComplementary Probability

Real questions that test this

मेजवानीसाठी जमलेल्या कुटुंबियांनी दोघात मिळून एक भाताचे भांडे, तिघात मिळून एक डाळीचे भांडे, पाचात मिळून एक भाजीचे भांडे आणि सहा जणांन मिळून एक श्रीखंडाचे भांडे, याप्रमाणे एकूण 108 भांडी पदार्थ मागवले. यामुळे कोणताही पदार्थ जास्त झाला वा कमी पडला नाही तर एकूण किती कुटुंबिय मेजवानीला उपस्थित होते ? Relatives who had gathered for a party had one bowl of rice between two, one bowl of dal among three, one bowl of vegetable among five and one bowl of shreekhand among six. In all they ordered 108 bowls of eatables; and no food was wasted or was it short. How many relatives were present for the party ?

a)30

b)60

c)90&check; Correct

d)120

Let total relatives be x. Bowls equation: x/2 + x/3 + x/5 + x/6 = 108. Taking LCM (30), (15x + 10x + 6x + 5x)/30 = 108 => 36x/30 = 108 => x = 90.

सर्व विद्यार्थ्यांच्या गटात 2/5 मुली आहेत आणि यातील 2/3 मुलींनी गणितात 90% च्या वर गुण मिळवले. जर 36 मुलींनी गणितात 90% च्या वर गुण मिळवले असतील तर मुली नसलेल्या विद्यार्थ्यांची संख्या दर्शवणारा पर्याय निवडा.

1)54

2)81&check; Correct

3)90

4)135

Let total students = x. Girls = (2/5)x. Girls with >90% = (2/3)*(2/5)x = (4/15)x = 36. Solving gives x = 135. Non-girls (boys) = x - (2/5)x = (3/5)x = (3/5)*135 = 81.