International Maths Olympiad Forum By SOF Olympiad Trainer - Page 650
  1. Home
  2. /  Forum

User Forum

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

Ans 1:

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 2:

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

Ans 3:

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 4:

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

Ans 5:

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

Ans 6:

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 7:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8

Ans 8:

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 9:

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

Ans 10:

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 11:

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 12:

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 13:

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 14:

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 15:

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

Ans 16:

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 17:

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

Ans 18:

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 19:

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

Ans 20:

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 21:

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

Ans 22:

D VISHNU from NARAYANA SCHOOL, CHENNAI
Class : Class 7

Ans 23:

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

Ans 24:

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

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:

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

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

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 8: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
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
Give me the sherbet candy I will give you a kindness badge I am in England

Ans 11:

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

Ans 12:

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 13:

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

Ans 14:

Aditya Rai from Kv No.1 Icchanath, Surat
Class : Class 7

Ans 15:

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

Ans 16:

Vihaan Yadav from NKBGS SECTOR 17 DWARKA NEW DELHI , Delhi
Class : Class 4
Master Question

Ans 17:

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

Post Your Answer

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

Post Your Answer

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.

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

Shreya Shruti from Airforce school , Bengaluru
Class : Class 8
Bbbbbbbbbbb

Ans 7:

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

Ans 8:

Anamkhan Mulla from Navrachna Sama, Vadodara
Class : Class 7

Ans 9:

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

Ans 10:

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 11:

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

Ans 12:

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 13:

Shreya Shruti from Airforce school , Bengaluru
Class : Class 8
Plus there is no solution

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:

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

Ans 16:

Vikruti Jain from Vibgyor Rise, Mumbai
Class : Class 9

Ans 17:

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

Ans 18:

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

Post Your Answer

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

Ans 1:

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 2:

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

Ans 3:

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 4:

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 5:

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

Ans 6:

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 7:

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

Ans 8:

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 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:

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

Post Your Answer

Hrushikesh from , Nagpur
Subject :IMO    Class : Class 7

Ans 1:

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

Ans 2:

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

Post Your Answer

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

Post Your Answer

Megha Hegde from PSBBLLA, Bengaluru
Subject :IMO    Class : Class 7

Ans 1:

Sriyansh from Surabhi , Hosapete
Class : Class 9
It's simple addition and subtraction. The total cost of both toys is 52.45+25.32=77.77 You gave him a hundred rupee note. So you gave him 22.23 rupees morethe actual prize which you would recieve as change. So the answer is 22.23 (100-77.77=22.23)

Post Your Answer

EKLAVYA GONDULE from DPS BHILAI, Bhilai
Subject :IMO    Class : Class 5

Ans 1:

Dhrishaj from Kendriya Vidyalay, IISc, Bangalore
Class : Class 6
ANS 33 is correct

Ans 2:

Niharikaa Pande from BILLABONG HIGH INTERNATIONAL SCHOOL MALAD, Mumbai
Class : Class 6
It is B since GH is not perpendicular by the smallest of angles. EF is perpendicular since if you look at the triangles or 5-sided shapes that are made when lines AB and EF come through a square with an angle not equal to 45 degrees, the sizes are the same. This shows that AB and EF are a pair of perpendicular lines.

Ans 3:

Kanjani Ghonge from Ira Global School, Dombivli
Class : Class 8

Ans 4:

Amogha from Hindustan international school, Guindy, Chennai
Class : Class 8
B is the correct answer guys, look at the blocks carefully.

Ans 5:

Jeronee from Christwood School, PERUMBAKKAM
Class : Class 5

Ans 6:

dhriti kaintura from Sunrise International School, abu dhabi
Class : Class 5
we need Sof to clear some of our issues here so SOF pls respond soon

Ans 7:

prarabdh thakur from podar international school, nashik
Class : Class 6
ans is c

Ans 8:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune
Class : Class 9
All transversal lines look perpendicular

Ans 9:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
Ans is C..... Olympiad Trainer please give master answer or solution.

Ans 10:

Rushil Arora from DPS, New Delhi
Class : Class 5
the answer should be C

Ans 11:

Dhrishaj from Kendriya Vidyalay, IISc, Bangalore
Class : Class 6
AND VERY SILLY MISTAKE TOO

Ans 12:

KRITHYA GUPTA from LOTUS VALLEY INTERNATIONAL SCHOOL, NOIDA
Class : Class 7

Ans 13:

Pratham Dave from GNS, Bangalore
Class : Class 7
Master answer required

Ans 14:

Dhrishaj from Kendriya Vidyalay, IISc, Bangalore
Class : Class 6

Ans 15:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
ans 7 is right. perpendicular = 90 degree intersecting straight lines

Ans 16:

Aditya Sai Kedarisetty from Sri Kumarans childrens Academy DKS, Bangalore
Class : Class 7
This question is itself wrong..

Ans 17:

Pulin Sharma from Marble Arch School, Mumbai
Class : Class 6
The answer is C] GH Because if we count the blocks in AB then, it's4 If we count the blocks in GH then, it's4 THIS S MY FORMULAE

Ans 18:

Anirudh Bagri from AMNS, Mumbai
Class : Class 5
question itself is wrong

Ans 19:

dhriti kaintura from Sunrise International School, abu dhabi
Class : Class 5
It is B because the point where EF and AB met it is the centre point of 4 squares making it correct. Guys it is easy but we must know the trick (btw some questions are wrong itself )

Ans 20:

KRITHYA GUPTA from LOTUS VALLEY INTERNATIONAL SCHOOL, NOIDA
Class : Class 7
it should be C

Ans 21:

Saanvi Jain from Lotus Valley International School, Noida
Class : Class 5
the answer is d as the line needs to be a proper slant and only i-j is properly slanted

Ans 22:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4
Wrong options SOF.!!!!!! Do you want us to fail

Ans 23:

Dhrishaj from Kendriya Vidyalay, IISc, Bangalore
Class : Class 6
WHOEVER HAS STUDIED IN GURRUZI 2024 WOULD KNOW THIS ANSWER BUT THE QUESTION ITSELF IS WRONG IT SHOULD BE WHICH ONE OF FOLLOWING IS (NOT) perpendicular to Ab

Ans 24:

Sinjini Chakraborti from Indus Valley World School , Kolkata
Class : Class 8

Ans 25:

Navya from Gyanshree, Noida
Class : Class 6
OMG, the question itself is wrong

Ans 26:

Mystic Girl from NPS, Bnagalore
Class : Class 6
How is the answer B?

Ans 27:

Prajwal Thakur from South Point High School, Kolkata
Class : Class 9
The answer should be C

Ans 28:

Suhani Agarwal from St. Mary's ICSE School, Mumbai
Class : Class 8

Ans 29:

Swarnava Pal from Vivekananda Mission School, Haldia
Class : Class 8
It's cofusing

Ans 30:

ARADHYA AGARWAL from NEW ERA PROGRESSIVE SCHOOL, Korba
Class : Class 8
Answer is C

Ans 31:

Shreejal moharana from DPS Greater Faridabad, Faridabad
Class : Class 8
b is totally correct just see the blocks carefully

Ans 32:

Sunita from Dps, Greater Noida
Class : Class 9

Ans 33:

Sof Team from Sof Olympiad Trainer Helpdesk, Bangalore
Class : Class 7
do not worry sof will make the same mistake on paper

Ans 34:

Niharikaa Pande from BILLABONG HIGH INTERNATIONAL SCHOOL MALAD, Mumbai
Class : Class 6

Ans 35:

Yajat Manoj from Vibgyor, Bengaluru
Class : Class 5
right

Post Your Answer