International Maths Olympiad Forum By SOF Olympiad Trainer - Page 491
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Adwait Shiva from Udgam School For Children, Ahemdabad
Subject :IMO    Class : Class 5

Ans 1:

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

Ans 2:

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

Ans 3:

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 4:

Monika Bhattacharya from the lexicon international school kalyaninagar, pune
Class : Class 5
D cannot be the answer at all.

Ans 5:

prarabdh thakur from podar international school, nashik
Class : Class 4

Ans 6:

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

Ans 7:

prarabdh thakur from podar international school, nashik
Class : Class 4
yes

Ans 8:

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

Ans 9:

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 10:

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

Ans 11:

somesh from Lotus valley school, Noida
Class : Class 6
it is d

Ans 12:

NAMAN SINGH from SETH ANANDRAM JAIPURIA SCHOOL, Ghaziabad
Class : Class 6
i also got it wrong

Ans 13:

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

Ans 14:

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

Ans 15:

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

Ans 16:

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

Ans 17:

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

Ans 18:

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

Ans 19:

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

Ans 20:

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

Ans 21:

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

Ans 22:

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

Ans 23:

Ridit Mishra from Delhi Public School, Gurgaon
Class : Class 6

Ans 24:

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

Ans 25:

Ridit Mishra from Delhi Public School, Gurgaon
Class : Class 6

Ans 26:

Shamvabi Samanta from Gitanjali Primary School,ICSE, Hyderabad
Class : Class 7
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 27:

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

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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:

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

Ans 4:

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

Ans 5:

Ashmi Narkar from VIBGYOR High, Airoli, Navi Mumbai
Class : Class 6
Ya Parth Kaushish you are right. Got it Vihaan :) Thanks

Ans 6:

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

Ans 7:

Kyra from Accadis international school, Germany
Class : Class 6

Ans 8:

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 9:

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

Ans 10:

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

Ans 11:

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 12:

Shourya Kumar from Delhi Public School Noida, Noida
Class : Class 8
it should be 0.166674175

Ans 13:

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

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

ANUSKA from DPS, NOIDA
Class : Class 3
TENS

Ans 4:

Kashika Goel from DPS Noida, Noida
Class : Class 4

Ans 5:

ANUSKA from DPS, NOIDA
Class : Class 3
TENS

Ans 6:

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

Ans 7:

Aditri from ISG oman, Ghubrah
Class : Class 5
tens

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

Mrs Sharma wrote a 2-digit number on the blackboard. Three students Lalit, Vinay and Prashant said the following statements about that number.
Lalit : "It is a 2-digit number but not the least".
Vinay : "It is the predecessor of least 3-digit number".
Prashant : "It is having three different digits".
If only two of the three students said the truth, who is definitely lying?

A Lalit
B Vinay
C Prashant
D Both (A) and (B)


Ans 1:

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

Ans 2:

Saanvi from DPS INTERNATIONAL SCHOOL, Singapore
Class : Class 3

Post Your Answer

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

Post Your Answer

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.

Post Your Answer

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

Ans 1:

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

Ans 2:

PRAFUL from KENDRIYA VIDYALAYA MYSORE , MYSURU
Class : Class 8

Post Your Answer

from , Kolkata
Subject :IMO    Class : Class 4

Ans 1:

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

Ans 2:

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

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

Post Your Answer

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

Ans 1:

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

Ans 2:

sauradeep from j v m Shyamali , ranchi
Class : Class 8

Ans 3: (Master Answer)

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

Ans 4:

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

Ans 5:

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 6:

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 7:

sauradeep from j v m Shyamali , ranchi
Class : Class 8

Ans 8:

Akriti ANannd from DPS Gaya, GAYA
Class : Class 4

Ans 9:

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...

Post Your Answer

from dps, bokaro
Subject :IMO    Class : Class 7

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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 7:

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

Ans 8:

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

Ans 9:

Kushal from Chirec, Hyderabad
Class : Class 7

Ans 10:

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

Ans 11:

Uttalika nanda from B. D. M. International, Kolkata
Class : Class 8
Option b will be correct. This question is there in IMO Workbook and there the answer is b only

Ans 12:

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

Ans 13:

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

Ans 14:

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

Ans 15:

Samriddhi Ghatak from THE HERITAGE SCHOOL, KOLKATA
Class : Class 9
B is correct

Ans 16:

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

Ans 17:

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

Ans 18:

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

Ans 19:

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

Ans 20:

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

Ans 21:

Shaurya Shendre from Sainik School Chandrapur, Nagpur
Class : Class 7
Option (B) is the correct answer

Ans 22:

Akashdeep Das from Gems Modern Academy, Dubai
Class : Class 7
The correct answer is B. I am sure.

Ans 23:

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

Ans 24:

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

Ans 25:

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

Ans 26:

Rishit Jain from Dps, Meeru5
Class : Class 10

Ans 27:

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

Ans 28:

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

Ans 29:

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

Ans 30:

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

Ans 31:

ALICE from Delhi Public School, UDAIPUR
Class : Class 7

Ans 32:

Ashwin Shridhar