International Maths Olympiad Forum By SOF Olympiad Trainer - Page 510
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Devansh from asn senior secondary school, delhi
Subject :IMO    Class : Class 3

Ans 1:

Soham Das from St. Joseph's School, Jiaganj
Class : Class 6
p

Ans 2:

Ivan Tyagi from Chirec International School , Hyderabad
Class : Class 7

Ans 3:

Ivan Tyagi from Chirec International School , Hyderabad
Class : Class 7
m

Ans 4:

Soham Das from St. Joseph's School, Jiaganj
Class : Class 6

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ishit from EUROSCHOOL THANE, THANE WEST
Subject :IMO    Class : Class 4

Ans 1:

Sashrika Pasunoori from KV Gachibowli, Hyderabad
Class : Class 5
Answer is A.

Ans 2:

Angshu from Dehli Public School Bangalore East, Bangalore
Class : Class 8

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radhika gopal from tips, Coimbatore
Subject :IMO    Class : Class 5

Ans 1:

Vikram from AVM, Mumbai
Class : Class 5
my answer is 4 but you marked it wrong

Ans 2:

Prateeshtha Ghosh from Samhita Academy, Bangalore
Class : Class 8
my answer is 4 but you marked it wrong

Ans 3:

Shuvangi Das from Vivekananda mission school, haldia
Class : Class 9
why they are giving the answer as 4

Ans 4:

Hriday Sriram from APL Global School, Chennai
Class : Class 5
Why is the solution answer D but, answer C? Answer 4 is answer D!!!

Ans 5:

Pradnya Ambatipudi from Vikas- The concept school, Hyderabad
Class : Class 7
the answer is 4{d}

Ans 6:

SRIJIT CHATTOPADHYAY from THE SHISHUKUNJ INTERNATIONAL SCHOOL, Indore
Class : Class 10
Their ( SOF Olympiad Trainer) solution is saying four , still they have marked 3 .

Ans 7:

Agastya Tripathi from dps gurgaon, Gurgaon
Class : Class 4

Ans 8:

Arav Aanand from Father Agnel School, Noida
Class : Class 6
The answer should be D. 4 as C, H, A, and I have at least a line of symmetry

Ans 9:

Agastya Tripathi from dps gurgaon, Gurgaon
Class : Class 4
my answer is 4 but you marked it wrong

Ans 10: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 11:

Kanjani Ghonge from Ira Global School, Dombivli
Class : Class 8
my answer is 4 but it is marked as 3

Ans 12:

Mannat Verma from Vivek High School , Chandigarh
Class : Class 6
Srijit, you are absolutely right!

Ans 13:

Abhijato Chatterjee from Bharatiya Vidya Bhavan, Kolkata, kOLKATA
Class : Class 6
in the solution they say 4 and it is 4 but they mark it as wrong

Ans 14:

Shaurya Shrivastava from Amanora school, Pune
Class : Class 6
MY ANSWER WAS MARKED BY ME AS 4 BUT THEY GAVE IT THAT I MARKED 3!!!!!!!!!!!

Ans 15:

Kavitharini Joseph from HUS, Chennai
Class : Class 6
my answer is 4 but you marked it wrong

Ans 16:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
the answer should be D,4 and not C,3 as the letters in CHAIR are C,H,A,I but not R have a line of symmetry.

Ans 17:

Joe Bipin from National Public School Agra, Bangalore
Class : Class 9
it is a printing mistake

Ans 18:

Arav Aanand from Father Agnel School, Noida
Class : Class 6

Ans 19:

manmeet from bbps pusa road, New Delhi
Class : Class 6

Ans 20:

DEBOSMITA GARAI from G.D.BIRLA CENTRE FOR EDUCATION, kolkata
Class : Class 6
your answer is wrong

Ans 21:

Aditya Saha from The Lexicon International School Kalyaninagar Pune, Pune
Class : Class 10
the answer is 4{d}

Ans 22:

adwitiya saxena from Ryan Internatinational School, Navi Mumbai
Class : Class 6
I think that it's a printing mistake. IN solution they are writing C,H,A,I have a line of symmetry which are 4 letters, but in the answer they are giving 3

Ans 23:

KRITHYA GUPTA from LOTUS VALLEY INTERNATIONAL SCHOOL, NOIDA
Class : Class 7
my answer i 4 but they marked it wrong and showed the correct answer 3 but in the solution they are saying the answer is 4.

Ans 24:

Tintin from Kolkata, Kolkata
Class : Class 9
the correct ans should be option D

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manish from cms, lucknow
Subject :IMO    Class : Class 8

Ans 1:

trainee from Gandhi city public school, pulgaon
Class : Class 8
the answer is(b) 65

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Aditi from Salt Lake School, Kolkata
Subject :IMO    Class : Class 9

The following table gives the ages of teachers in XYZ school.₹

A teacher is selected at random from the group, then which of the following statements is INCORRECT?

A Probability of a teacher having age greater than or equal to 35, is
B Probability of ateacher having age more than or equal to 25 and less than 40, is
C Probability of a teacher selected is of age not less than 30, is
D Probability of a teacher selected from the youngest group, is


In the age group 35-40, it should be 300 instead of 320 .Only then is the answer coming ..according to the solution it is 300.

Ans 1:

Ankit Kumar from Rkm, Chapra
Class : Class 9

Ans 2:

ARYAN PRASAD from Podar Internation School, Vadodara
Class : Class 9
option c

Ans 3:

ARYAN PRASAD from Podar Internation School, Vadodara
Class : Class 9

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Akriti ANannd from DPS Gaya, GAYA
Subject :IMO    Class : Class 7

Which of the following statements is CORRECT?
Statement-1 :Mathematics textbook for Class VII has 320 pages. The chapter ‘Symmetry’ runs from page 261 to page 272. The ratio of the number of pages of this chapter to the total number of pages of the book is 3 : 81
Statement-2 :In a school of 100 students, only 2 out of 5 students can participate in a quiz. The percentage of students that participate in the quiz is 40%.

A Only Statement-1
B Only Statement-2
C Both Statement-1 and Statement-2
D Neither Statement-1 nor Statement-2


Ans 1:

Harsh Kumar from Maharishi Vidya Mandir, Guwahati
Class : Class 8
I have confusion in statement 1 but 2nd statement are correct. 1st statement in first no of pages in symmetry chapter is 12. total no pages is 320. the ratio is 12:320 =3:81 = 1 :27 2nd statement 2 out of 5 can participate means 40% of the student the 40% of 100 is 40 the percentage of students that participate in the quiz = 40/100*100 40%

Ans 2:

from Podar International School,Dhule, Dhule
Class : Class 8
12:320=3:80 in its simplest form. It is not equal to 3:81. You may simplify it like 12/320 divide both numerator and denominator by 4. You will surely get the answer as 3:80.

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Shivam kushwah from Sanskar valley public school, Alampur bhind mp
Subject :IMO    Class : Class 7

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ishaan samantra from FBS , Bhubaneswar
Subject :IMO    Class : Class 3

Ans 1:

Kashika Goel from DPS Noida, Noida
Class : Class 6

Ans 2:

Kashika Goel from DPS Noida, Noida
Class : Class 6

Ans 3:

Aadvik from Gyanshree School, Noida
Class : Class 6

Ans 4:

Arvi from Isbe , Europe
Class : Class 6

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Aadi Turlapati from Glendale International school, Hyderabad
Subject :IMO    Class : Class 5

Ans 1:

Sarang Shete from Amanora School, Pune
Class : Class 8
According to DMAS it should be D.

Ans 2:

Haasini Krishna from Global edge, Hyderabad
Class : Class 6
yes, we also got the same answer. SOF should explain what rukle they followed

Ans 3:

Nila Pillai from Chennai public School, Chennai
Class : Class 6
No according to Bodmas rule the answer given by SOF is CORRECT

Ans 4:

Prajjwal Dey from MLZS Wakad, PUNE
Class : Class 6
Yes It should be D according to bodmas rule

Ans 5:

adwitiya saxena from Ryan Internatinational School, Navi Mumbai
Class : Class 6
The answer should be D not A. In the first line they have used BODMAS, but in the second they have not and if we use BODMAS we will get option d.

Ans 6:

Prajjwal Dey from MLZS Wakad, PUNE
Class : Class 6
But i checked with a calculator which gave the answer as a which is 69.48

Ans 7:

Aadi Turlapati from Glendale International school, Hyderabad
Class : Class 8
As per DMAS rules, the Answer is D

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Krethick Ravichandran from FIITJEE GLOBAL SCHOOL , India
Subject :IMO    Class : Class 5

Ans 1:

SUMANTA RAHA from BIRBHUM ZILLA SCHOOL, SURI
Class : Class 2

Ans 2:

SrisaranN from National school, Bangalore
Class : Class 8

Ans 3:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 7

Ans 4:

Manish Mulimani from chrysalis high, Bengaluru
Class : Class 8

Ans 5:

Inamul from Springs, Nilambur
Class : Class 8
approach to this problem is not given correctly in solution. thought the answer given is correct.

Ans 6:

Deep Ajay Ovhal from Podar International School, Latur, Latur
Class : Class 7

Ans 7:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9
did you all get this answer

Ans 8:

Aarav Hitesh Parikh from Gopal Sharma International School, Mumbai
Class : Class 8

Ans 9:

Vaishnavi Sharma from Holy Angels ISC school , THIRUVANANTHAPURAM
Class : Class 8

Ans 10:

Tanmay Chaudhary from MIET public school, MEERUT
Class : Class 7
QUESTION IS NOT WRONG IN THIS WE HAVE TO SEE THE OPTION AND THEN DO IT . LIKE WE CAN ASSUME THAT TOTAL AMOUNT WAS OPTION B THEN DO THE CALLCULATION BUT FOR B WE DO NOT GET THE AMOUNT LEFT 1330

Ans 11:

Tamrashi Pani from National Public School, Bangalore
Class : Class 8

Ans 12:

Apoorv Raut from Podar International School Jalna, Jalna
Class : Class 7
question is write but it is too tough for 5 th std that to just for 1 mark

Ans 13:

Saket S from CPS Global School, Chennai
Class : Class 5

Ans 14:

madhav from null, null
Class : Class 5
wasted 20 mins for this only

Ans 15:

Adhav Subhashini Arun Kumar from Legacy School Bangalore, Bangalore
Class : Class 5

Ans 16:

SUMANTA RAHA from BIRBHUM ZILLA SCHOOL, SURI
Class : Class 2

Ans 17:

Paavni Vaish from VIBGYOR HIGH HENNUR, Bangalore
Class : Class 5

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