International Maths Olympiad Forum By SOF Olympiad Trainer - Page 657
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Adwait Shiva from Udgam School For Children, Ahemdabad
Subject :IMO    Class : Class 5

Ans 1:

Shreyas Singh from Podar International School, Pune
Class : Class 6

Ans 2:

Riddhiraj Saha from St. Xeviers Institution , Panihati, Kolkata
Class : Class 8

Ans 3:

Riddhiraj Saha from St. Xeviers Institution , Panihati, Kolkata
Class : Class 8
All 4 figure has perpendicular line along perimeter

Ans 4:

Uzair Khan from Narayan Olympiad School, Chennai
Class : Class 5

Ans 5:

Siddarth Rastogi from Greenwood High Int'l School, Bangalore
Class : Class 5
A perpendicular line is 90 degrees, last one doesn't count as 90 degrees, so C

Ans 6:

prarabdh thakur from podar international school, nashik
Class : Class 6
yes

Ans 7:

Ashwak from Cambridge, Jalandhar
Class : Class 9
All figures have perpendicular lines

Ans 8:

Ayushi Chatterjee from DPS Noida, Noida
Class : Class 5
Angles consideration is confusing ....sometime inner and sometime outer angle is consider ....actually SINGLE LINE FIGURE SHOULD BE GIVEN

Ans 9:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
it should be a. thats what my supery dupery expert dad said

Ans 10:

Riddhiraj Saha from St. Xeviers Institution , Panihati, Kolkata
Class : Class 8

Ans 11:

Anika Saha from New Town School, KOLKATA
Class : Class 6
how

Ans 12:

NAMAN SINGH from SETH ANANDRAM JAIPURIA SCHOOL, Ghaziabad
Class : Class 8
i also got it wrong

Ans 13:

prarabdh thakur from podar international school, nashik
Class : Class 6

Ans 14:

Rimi from TLISK, pune
Class : Class 9
D cannot be the answer at all.

Ans 15:

Shamvabi Samanta from Gitanjali Primary School,ICSE, Hyderabad
Class : Class 9
It should be C as it is written that we have to find the perpendicular line for each figure, so there are three figures with perpendicular line but if we consider how many perpendicular lines are there in this picture then it should be 4. This answer is absolutely wrong.

Ans 16:

TRISHA SINGH from St. Joseph Shaktinagar, SONEBHADRA
Class : Class 7
CONFUSING QUESTION

Ans 17:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7
Something is wrong here. We have to confirm about it.

Ans 18:

Amlan choudhury from GD Birla center for education , Kolkata
Class : Class 7

Ans 19:

Arav Jain from Global edge school, Hyderabad
Class : Class 5
How

Ans 20:

Harsh Sobti from the samhita academy, BLR
Class : Class 5

Ans 21:

Ridit Mishra from Delhi Public School, Gurgaon
Class : Class 8

Ans 22:

Ridit Mishra from Delhi Public School, Gurgaon
Class : Class 8

Ans 23:

somesh from Centre point katol road, Nagpur
Class : Class 6
it is d

Ans 24:

Anirudh Bagri from AMNS, Mumbai
Class : Class 5
'c' = correct

Ans 25:

Rohan TR from Sri Aurobindo memorial school, Bangalore
Class : Class 6
It is c

Ans 26:

Ashwak from Cambridge, Jalandhar
Class : Class 9
But what about the curved arrow

Ans 27:

Pratham Dave from GNS, Bangalore
Class : Class 7
D is the answer to this question because all the lines are perpendicular and in the 3rd one the bottom lines are perpendicular

Ans 28:

Aaditya Malhotra from Isaac Newton Global School, Mumbai
Class : Class 3
C

Ans 29:

Clianta Nagi Reddy from Pinnacle High InternationL School, Mumbai
Class : Class 4

Ans 30:

Rayna Agarwal from St. Xaviers High School, Gurgaon
Class : Class 5
The answer should be C because in the first figure there are prependicular lines in the bottom in figure 2 there are prependicular lines all four sides near the arrows and in figure 3 there are prependicular lines at the bottom while there are no prependicular lines in figure 4 as they are all acute and obtuse angles so, the answer should be C not D.

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Faraz Khan from Rassaz International, Mumbai
Subject :IMO    Class : Class 6

Ans 1:

Agastya Soni from DPS Whitefield, Bengaluru
Class : Class 6
It should be 0.1666731750

Ans 2:

Shreyas K from Kennedy High The Global School, Hyderabad
Class : Class 9
correct answer is 0.0000515686. So, none of the provided options are correct.

Ans 3:

Kumar Krishiv from Apeejay School, Noida
Class : Class 8
None of these are correct I have done in calculator

Ans 4:

Faraz Khan from Rassaz International, Mumbai
Class : Class 6
none of the options are correct

Ans 5:

Ashwak from Cambridge, Jalandhar
Class : Class 9
None of the given options is correct .

Ans 6:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
none of the options is correct

Ans 7:

Shourya Kumar from Delhi Public School Noida, Noida
Class : Class 9
it should be 0.166674175

Ans 8:

Vihaan Binaykia from Riverside, AHMEDABAD
Class : Class 5
Answer given is correct:0.0001289 - (0.0000000274 x 1293) 0.0000419032=(0.0001289 - 0.0000354282) 0.0000419032=0.0000934718 0.0000419032=0.00011353750

Ans 9:

Jaiansh Dabas from St Xaviers High School, Gurgaon
Class : Class 7
I tried it a 1000 times with calculator it is giving 0.0000515686

Ans 10:

Carrie Goyal from OPBMS, Mandi Gobindgarh
Class : Class 7
according to bodmas d option is correct

Ans 11:

Rannvijay Singh from Palms Middle School, LA, Los Angeles
Class : Class 7

Ans 12:

Rannvijay Singh from Palms Middle School, LA, Los Angeles
Class : Class 7
none of the options are correct and the solution makes no sense the correct answer is 0.0000515686sof is glitched

Ans 13:

Parth Kaushish from MDPS, Faridabad
Class : Class 6
the correct answer is going to be 0.0000515686 . I have tried it 10 times. Its given wrong pls correct it SOF

Ans 14:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
Ya Parth Kaushish you are right. Got it Vihaan :) Thanks

Ans 15:

DIPANWITA MAITI from SPINGDALES SCHOOL PUSA ROAD, New Delhi
Class : Class 9

Ans 16:

Kyra from Accadis international school, Germany
Class : Class 6

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Aditya Singh from Vibgyor Haralur Bangalore, Bangalore
Subject :IMO    Class : Class 3

Ans 1:

ANUSKA from DPS, NOIDA
Class : Class 3
TENS

Ans 2:

Adrito Roy from Stem world School, Kolkata
Class : Class 4
C

Ans 3:

Aditi Shiv Shankar Jaiswal from Delhi Public School Jeddah, Jeddah
Class : Class 4

Ans 4:

Aarna Agarwal from Manav Rachna International School, Gurgaon
Class : Class 5

Ans 5:

ANUSKA from DPS, NOIDA
Class : Class 3
TENS

Ans 6:

Kashika Goel from DPS Noida, Noida
Class : Class 7

Ans 7:

from AHPS,
Class : Class 3

Ans 8:

Aditi Shiv Shankar Jaiswal from Delhi Public School Jeddah, Jeddah
Class : Class 4
C

Ans 9:

Avighna Shastri from doha modern indian school, doha
Class : Class 2
tens

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Aditya Singh from Vibgyor Haralur Bangalore, Bangalore
Subject :IMO    Class : Class 3

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D 183 from Lotus Valley International School, Noida
Subject :IMO    Class : Class 4

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Gireesha from innocent hearts school jalandhar, Jalandhar
Subject :IMO    Class : Class 9

Ans 1: (Master Answer)

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

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Priya Lalwani from Sophia Sr Sec School, Bikaner
Subject :IMO    Class : Class 8

Ans 1:

PRAFUL from KENDRIYA VIDYALAYA MYSORE , MYSURU
Class : Class 8

Ans 2:

J Gowshika from velammal vidyalalaya, Chennai
Class : Class 8
its given c as the ans in the solutions pls explain how

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from , Kolkata
Subject :IMO    Class : Class 4

Ans 1:

Kavya Kaskar from Arya Vidya Mandir- Juhu, MUMBAI
Class : Class 5

Ans 2:

Kavya Kaskar from Arya Vidya Mandir- Juhu, MUMBAI
Class : Class 5

Ans 3:

Pranjal Karna from Delhi Public School, Greater Noida
Class : Class 6
There are four equations P Q R=75; Q R S=90; P R S=100; Q S P=80Add them up all. You will get 3P 3Q 3R 3S=345. This means P Q R S=115We can replace the value of P Q R=75 in the above to get the value of S which would be 40. From the second equation, we can get the total value of Q R 40=90 as 50

Ans 4:

akriti from delhi public school, banglore
Class : Class 4

Ans 5:

Ishan M from Ekya School ITPL, Bangalore
Class : Class 6
How is this question done

Ans 6:

Pranjal Karna from Delhi Public School, Greater Noida
Class : Class 6
Spaces is " ", the value disappeared after I posted the comment

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S Sreelakshmi from Sarvodaya vidyalaya, Trivandrum
Subject :IMO    Class : Class 7

Ans 1:

Shubhangi Pathak from Lilavatibai Podar High School, Mumbai
Class : Class 8
in my opinion both a and c are correct

Ans 2:

Shalini from Kendriya Vidyalaya A. G. C. R. Colony, New Delhi
Class : Class 5
correct answer is C as 5/6*6/6= 30/36 but resultant fraction will always be 5/6

Ans 3: (Master Answer)

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

Ans 4:

Akriti ANannd from DPS Gaya, GAYA
Class : Class 4

Ans 5:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
The correct answer is a because 1/2 < 2/3 < 3/4 < 4/5 < 5/6 < 6/7 < 7/8 < 8/9...

Ans 6:

sauradeep from j v m Shyamali , ranchi
Class : Class 10

Ans 7:

Nandu from The Asian School, Bahrain
Class : Class 3
If they tell increase by addition or multiplication , we'll know whether answer is C or A otherwise both answers are right

Ans 8:

Saptarshi Ghosh from dps, newtown, kolkata
Class : Class 8
the correct answer is c

Ans 9:

sauradeep from j v m Shyamali , ranchi
Class : Class 10

Ans 10:

Apoorv Raut from Podar International School Jalna, Jalna
Class : Class 7
my answer is d

Ans 11:

Asmi Raniga from Indian school Ghubra, Muscat
Class : Class 7
C

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from dps, bokaro
Subject :IMO    Class : Class 7

Ans 1:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 10
B is correct

Ans 2:

Janvi Barman from St MarysGirls, Pune, Pune
Class : Class 8
b is the correct answer

Ans 3:

Mohinder singh from Sacred heart convent school, Ludhiana
Class : Class 7
B is correct not A

Ans 4:

Akashdeep Das from Gems Modern Academy, Dubai
Class : Class 8
The correct answer is B. I am sure.

Ans 5:

Archisman Biswas from Santipur Municipal High School, Nadia
Class : Class 9
It is obviously b.

Ans 6:

Mehaan Bhatt from Pawar Public School , Mumbai
Class : Class 6
B is correct answer

Ans 7:

Anshuman D from MVM, Hyderabad
Class : Class 9
Yes B is right

Ans 8:

Pulkit Gupta from Maxfort School, New Delhi
Class : Class 7
B is the correct answer. A cannot be the correct answer as

Ans 9:

SAGNIK CHAKRABORTY from DELHI PUBLIC SCHOOL , KOLKATA
Class : Class 9
answer is b

Ans 10:

GOVIND from sant tukaram SCHOOL,
Class : Class 9
i think B is correct answer

Ans 11:

Amogh from Ben Hur Public School, Pilibhit
Class : Class 7

Ans 12:

Chaitanya L K from SKCHEC, bangalore
Class : Class 8
yes,B is the correct answer.Not A.

Ans 13:

Ashwin Shridhar from Vidyashilp Academy, Bangalore
Class : Class 9
B is correct not A

Ans 14:

Sai shankar S from geethanjali vidyalaya, Bangalore
Class : Class 6
I also think B is correct

Ans 15:

swayam aditya from LR DAV public school, Cuttack
Class : Class 8
ans is b

Ans 16:

Sneha Ghosh from St Xavier high school, Howrah, Howrah
Class : Class 7
Answer B is correct not A

Ans 17:

Y Yashaswini from Dps Khajaguda, Hyderabad
Class : Class 8
I do not think that the correct answer is A

Ans 18:

Amogh from Sindhi High School, Bangalore
Class : Class 7
B is correct

Ans 19:

Nikhil Sai Srinivas from FIITJEE, Hyderabad
Class : Class 6
B is correct and I am gonna support B

Ans 20:

Shreeya Amol Tade from English Medium School , Pune
Class : Class 10
According to me, B is the answer....

Ans 21:

tashu gupta from Shanti Asiatic , jaipur
Class : Class 7
B IS THE RIGHT ANSWER

Ans 22:

Taanvi from , Bangalore
Class : Class 9
B is the correct answer since, the second portion in option A doesn't satisfy the order

Ans 23:

PARTH SETHI from DPS Noida, New Delhi
Class : Class 9
I do not think that the correct answer is A

Ans 24:

Rishit Jain from Dps, Meeru5
Class : Class 10

Ans 25:

Zidaan Waldiya from St. Gregorios High School, MUMBAI
Class : Class 7
Answer is supposed to be B not A

Ans 26:

Smriti from Apeejay, Nerul, Navi Mumbai
Class : Class 9
b is correct

Ans 27:

JANYA CHANGELA from UDGAM SCHOOL FOR CHILDREN , Ahmedabad
Class : Class 8
ANSWER B IS ONLY CORRECT

Ans 28:

Nishtha Dargar from Blue Ridge Public School, Pune
Class : Class 8
It is B

Ans 29:

Kushal from Chirec, Hyderabad
Class : Class 7

Ans 30:

Aarnavi Mann from Scholars rosary Sr. Sec. School, Rohtak
Class : Class 8
The answer b is correct as the order of congruence is different in every potion but b is correct

Ans 31:

Shaurya Shendre from Sainik School Chandrapur, Nagpur
Class : Class 8
Option (B) is the correct answer

Ans 32:

Joshua Sen from Montfort Senior Secondary School, Roorkee
Class : Class 10
the optoins are the same

Ans 33:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 34:

Uttalika nanda from B. D. M. International, Kolkata
Class : Class 10
Option b will be correct. This question is there in IMO Workbook and there the answer is b only

Ans 35:

Manoj Sohan Gajula from Vibgyor High, Bangalore
Class : Class 7
B is correct

Ans 36:

Shreeya Amol Tade from English Medium School , Pune
Class : Class 10

Ans 37:

ALICE from Delhi Public School, UDAIPUR
Class : Class 9

Ans 38:

Samriddhi Ghatak from THE HERITAGE SCHOOL, KOLKATA
Class : Class 10
B is correct

Ans 39:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
B is the correct answer

Ans 40:

santosh katiyar from narayana vidhyalayam, Nagpur
Class : Class 7
both a and b are correct.

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