International Maths Olympiad Forum By SOF Olympiad Trainer - Page 698
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lakshmi priya from Emerald Valley Public School, Salem
Subject :IMO    Class : Class 10

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is A.

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lakshmi priya from Emerald Valley Public School, Salem
Subject :IMO    Class : Class 10

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

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Pallab Layak from Vidyashilp Academy, Bangalore
Subject :IMO    Class : Class 8

Ans 1:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
This question is unclear if synopsis does not define it

Ans 2:

aditya arora from Heritage Experiential Learning School, gurugram
Class : Class 8
i agree, A is correct, there is no incorrect answer, as a rectangle is a special trapezium

Ans 3:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune
Class : Class 9
Since the options seem incorrect, kindly report an error for this question. Hopefully this gets reviewed.

Ans 4:

Darsh Goel from Phoneix Greens, Hyderabad
Class : Class 9
Wrong Question guys both a and d look incorrect as rectangle is not a trapezium and even square's diagonals are equal.

Ans 5:

Pranav Gupta from Ryan International School, Delhi
Class : Class 9
everyone to kindly check my panswer post it will most probably help u resolve what is the answer and please if there is any incorrect answer in my provided answer, please tell that thing.

Ans 6:

Yash Bindal from Global Indian International School, Singapore
Class : Class 9

Ans 7:

Aryan Keswani from Delhi Public School, Mathura Road, New Delhi
Class : Class 10
Wrong question guys !

Ans 8:

Antara Mazumdar from Navy Children School, Mumbai
Class : Class 8

Ans 9:

Anirudh from 989820Delhi Pubic school Rohini , Delhi
Class : Class 8
D is answer

Ans 10:

arnav raj sharma from gulibulium school, new york
Class : Class 8
all options are correct(A) a rectangle follows all the characteristics of a trapizium. It has one pair of parllel sides. it has four sides and sum of all the angles is 360(b) it can be drawn like one angle is 90 and four sides are 40,40,50,50 than it is a rectangle which is quadrilateral(c)It is a law that sum of ext. angles in every polygon is 360 and sum of int. angles in a triangle is 180 which is half of 360(d) all the quadrilaterals that have equal diagonals follow all the rules of a rectangle like square which has two set of equal and parllel sides and its diagonals are equal. A square also has all right angles.

Ans 11:

Aayushman mohapatra from Sental The Global School, Hyderabad
Class : Class 9

Ans 12:

rajib jana from DPS MEGA City, Kolkata
Class : Class 8
A rectangle is a type of trapezium only and anyway the diagonals of a square is also equal

Ans 13:

Janani swethaa from CS ACADEMY, Erode
Class : Class 10
The answer is D

Ans 14:

D VISHNU from NARAYANA SCHOOL, CHENNAI
Class : Class 7

Ans 15:

Angshu from Dehli Public School Bangalore East, Bangalore
Class : Class 9
A is correct. By definition, a trapezium has ONLY ONE pair of parallel sides. A rectangle has 2 pairs of parallel sides, hence it is not a trapezium.

Ans 16:

N Khanna from MJKPS, New Delhi
Class : Class 10
Both a and d options are correct, its marker wrong. Rectangle is a special trapezium and square also has all sides equal

Ans 17:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8

Ans 18:

Pranav Gupta from Ryan International School, Delhi
Class : Class 9
all options can be correct but if we see logically, option (D) states that "if the diagonals of a quadrilateral are equal it must be a rectangle" whereas the diagonals of a kite can also be equal.

Ans 19:

Tejas Agarwal from Prudence School , New Delhi
Class : Class 10
The answer is D as Rectangle is also a special type of trapezium so it is correct . Also, the option B is correct. Option C is correct too as interior angle sum of triangle is 180 and the exterior angle sum is double i.e. 360The correct answer would be option D as isosceles trapezium also has its diagonals equal therefore it is the incorrect statement required. Therefore, the answer should be D instead of C

Ans 20:

Vipin Garg from BAL BHARATI PUBLIC SCHOOL, New Delhi
Class : Class 7
Answer should be D diagonals are equal in square as well So if diagonals are equal it need not be a rectangle

Ans 21:

Arkajyoti Das from techno, Cooch Behar
Class : Class 9
wrong answer.it should be d

Ans 22:

VYOM VIVEK PATEL from Doon Public School Bhuj, Bhuj Kuchchh
Class : Class 9

Ans 23:

Arnav from NPS, Bangalore
Class : Class 9
all answers are correct, this question is wrong

Ans 24:

Pallab Layak from Vidyashilp Academy, Bangalore
Class : Class 9
Trapezium is a quadrilateral with two parallel sides. Parallelogram is a special case of trapezium and rectangle is a special case of parallelogram, hence rectangle is a special case of trapezium

Ans 25:

Tanmay singh from KPSI ATAL NAGAR , NAYA RAIPUR, RAIPUR
Class : Class 10
rectangle is also a trapezium because atleast one pair of sides parallel……..

Ans 26:

Aarush Babbar from Birla Vidya Niketan New Delhi, New Delhi
Class : Class 8
all options are true, i think option(c) should be "Triangle is a polygon whose exterior angle is double its interior angle". This way option(c) will be INCORRECT

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basant raj from delhi public school, gaya
Subject :IMO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

Ans 2:

Zephaniah and Josiah from Gems Modern Academy, Dubai
Class : Class 1

Ans 3:

Sia Parekh from Pawar Public School, Mumbai
Class : Class 7
How the answer is C

Ans 4:

Aditya Rai from Kv No.1 Icchanath, Surat
Class : Class 8

Ans 5:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
If you all agree the answer is C You all will get from me a tasty little sherbet candy

Ans 6:

Vihaan Yadav from NKBGS SECTOR 17 DWARKA NEW DELHI , Delhi
Class : Class 5
Master Question

Ans 7:

Ashwak from Cambridge, Jalandhar
Class : Class 9
I agree that the answer is C …………….. Now give me the "Sherbet Candy" Ashmi. Ha Ha Ha !!!

Ans 8:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4
The correct answer is c

Ans 9:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4

Ans 10:

AARNA GOEL from UPTON SCHOOL, ENGLAND
Class : Class 6
yes i agree the anwer is c

Ans 11:

AARNA GOEL from UPTON SCHOOL, ENGLAND
Class : Class 6
Give me the sherbet candy I will give you a kindness badge I am in England

Ans 12:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4

Ans 13:

sudhish from St Pauls English School, Bangalore
Class : Class 2
Yap, the right answer is C

Ans 14:

Sia Parekh from Pawar Public School, Mumbai
Class : Class 7
I Did not at all understand!!!!!!!

Ans 15:

ANSHUMAN JAIN from emrald heights international school, Indore
Class : Class 4
Anshuman malhotra from mumbai , i got it correct

Ans 16:

MYRA RAINA from SANDKRITI SCHOOL BHUKUM PUNE, PUNE
Class : Class 4
Can you please explain how the answer is "c" .

Ans 17:

Shubh Gupta from DPS Gurugram Sec 84, Gurugram
Class : Class 4

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Smita Desai from GOKULDHAM HIGHSCHOOL , MUMBAI
Subject :IMO    Class : Class 3

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Yashashree Somdatta Kulkarni from Delhi Public School, Nashik
Subject :IMO    Class : Class 4

Ans 1:

Dheer Pandey from Sentia The Global School, Hyderabad
Class : Class 10
because its asking the unshaded figure not the shaded figure

Ans 2:

Arnav kaul from Chirec, Hyderabad
Class : Class 2
because it is unshaded not shaded.

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Dhruv Garg from Dewan Public School, Meerut
Subject :IMO    Class : Class 5

Ans 1:

Aniket Amit Kulkarni from Raghavdas Vidayala, Pune
Class : Class 5
why are you writing same sentence

Ans 2:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
master admin answer

Ans 3:

Vikruti Jain from Vibgyor Rise, Mumbai
Class : Class 5

Ans 4:

A Andrew from Lalaji Memorial Omega International School, Chennai
Class : Class 5
b is not the answer but d because in a symetry , both the sides should be opposite .

Ans 5:

Anvi Sindhwani from BVM, NAGPUR
Class : Class 5
B is the correct answer and not D

Ans 6:

Dhriiti from BCM, Ludhiana
Class : Class 8
The answer is D only

Ans 7:

Aniket Amit Kulkarni from Raghavdas Vidayala, Pune
Class : Class 5

Ans 8:

Anamkhan Mulla from Navrachna Sama, Vadodara
Class : Class 7

Ans 9:

shubhavi Dhondge from NPS, Banagalore
Class : Class 9
Even I think the answer is B

Ans 10:

Saanvi Prasad from DPS Noida, Noida
Class : Class 5
Guys, it's d.. due to some explanations, I clicked b.... also, the people saying b are wrong as d showed up in my test results

Ans 11:

Shreya Shruti from Airforce school , Bengaluru
Class : Class 9
Plus there is no solution

Ans 12:

shubhavi Dhondge from NPS, Banagalore
Class : Class 9
b is the correct answer

Ans 13:

Shreya Shruti from Airforce school , Bengaluru
Class : Class 9
Bbbbbbbbbbb

Ans 14:

Aniket Amit Kulkarni from Raghavdas Vidayala, Pune
Class : Class 5
why are you silent you dont`t have head see properly then answer me

Ans 15:

adithya r from PSBB MS, Chenai
Class : Class 5
I THINK B IS THE ANSWER

Ans 16:

Anukarsh Dubey from Parvati Radhakrishna Formara school, Mathura
Class : Class 6
I thought A was the answer but the answer is d

Ans 17:

Aniket Amit Kulkarni from Raghavdas Vidayala, Pune
Class : Class 5
B is only the answer because it is symetry

Ans 18:

Ahoraatra Mondal from GOKHALE MEMORIAL GIRLS' SCHOOL, HOWRAH
Class : Class 4
It's b guys it's b not d

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Dhruv Garg from Dewan Public School, Meerut
Subject :IMO    Class : Class 5

Ans 1:

Rushil Arora from DPS, New Delhi
Class : Class 5
the answer to this question can also be b because option b also has a line of symmetry

Ans 2:

Shimoni Agarwal from delhi Public School, Moradabad
Class : Class 5

Ans 3:

Adway Bachchan from Indian School Sohar, Sohar
Class : Class 8
answer is not b because the lines on top of the letter are horizontal

Ans 4:

saumit from Narayana E-techno, mumbai
Class : Class 5
I say B is also a line of symmetry but the correct answer is D

Ans 5:

Aniket Amit Kulkarni from Raghavdas Vidayala, Pune
Class : Class 5
But B answer is also the correct answer

Ans 6:

saumit from Narayana E-techno, mumbai
Class : Class 5

Ans 7:

Shimoni Agarwal from delhi Public School, Moradabad
Class : Class 5
But B has slanting line of symmetry.The line of symmetry doesn't means only to be strategy

Ans 8:

Pulin Sharma from Marble Arch School, Mumbai
Class : Class 6
According to me the correct answer to this question is D] Because it has a line of symmetry from top to bottom

Ans 9:

DIVISHA.AGARWAL from d.p.s. noida, Noida
Class : Class 5
D is the answer because it is straight but option B is not correct because over here it is slanting , and there is no such symmetry

Ans 10:

Shimoni Agarwal from delhi Public School, Moradabad
Class : Class 5
sorry

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Hrushikesh from , Nagpur
Subject :IMO    Class : Class 7

Ans 1:

Pisal Dhruv from Veer Bhagat Singh International School, Mumbai
Class : Class 7
i agree

Ans 2:

RAHUL S ROY from ST.XAVIERS HIGH SCHOOL,VAPI, VAPI,GUJARAT
Class : Class 7
option a is correct as angle pqs is epual to angle qsa +angle ast (alternate interior angle)=70 98=28+x x=98-28 x=70 ast+tsb=180(straight angle) 70+y=180 y=180-70 y=110

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harnoor from cambridge international school, nawanshahr
Subject :IMO    Class : Class 8

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