International Maths Olympiad Forum By SOF Olympiad Trainer - Page 605
  1. Home
  2. /  Forum

User Forum

Ask Your Question
SURAJ from NPMHSS, CHENNAI
Subject :IMO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

85+75689+4356-10012 = 70118


Post Your Answer

SURAJ from NPMHSS, CHENNAI
Subject :IMO    Class : Class 4

Post Your Answer

kushal from indian school sohar, sohar
Subject :IMO    Class : Class 2

Post Your Answer

nimay gupta from Shiv Nadar School, noida
Subject :IMO    Class : Class 6

Ans 1:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
P=l+b×2 L=5w B=w =5w+w×2 =6w×2 =12w cm

Ans 2:

Shreyas K from Kennedy High The Global School, Hyderabad
Class : Class 9
6w

Ans 3:

Shivani Shivu Singh from Pawar Public School Chandivili , Mumbai
Class : Class 8

Ans 4:

Pisal Dhruv from Veer Bhagat Singh International School, Mumbai
Class : Class 7
Breadth=w, Length is 5 times more, Therefore, length = 5w Therefore, perimeter=2(5w+w) =2*6w =12w Hence, b is the correct answer

Ans 5:

Anil sinha from DPS, Chandigarh
Class : Class 4
Answer is B

Ans 6:

MANAS RANJAN from Tender Heart Senior Secondary School, RANCHI
Class : Class 6
answer is 12W cm as the formula is 2*(length+breadth)=perimeter ,so w ( breadth) +5w (length) =6w (length+breadth) and then 6w *2 =12w(answer)

Post Your Answer

Ritin Jhamb from bjbj, Jalandhar
Subject :IMO    Class : Class 6

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is D

 


Ans 2:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 9
The answer is d because 2/4 is smaller than 2/3.

Ans 3:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
yeah

Ans 4:

Shwetank Balaji Kotalwar from Orchid International Nigadi, Pune
Class : Class 6

Ans 5:

DEBOSMITA GARAI from G.D.BIRLA CENTRE FOR EDUCATION, kolkata
Class : Class 6
yeah....crrct

Ans 6:

DEVAANGANA SARDAR from G.D. Birla Centre for Education, Kolkata
Class : Class 7
But the shaded portion is equal in both the cases

Post Your Answer

Anshuman Mishra from kv no 3, Bhubaneswar
Subject :IMO    Class : Class 6

Ans 1:

anveshi srimal from cathedral and john connon school, mumbai
Class : Class 7
yes please correct. There are 2 division signs which represent addition n subtraction which leads to various answers

Ans 2:

Aditi Saha from Bishops KalyaniNagar, Pune
Class : Class 4

Ans 3:

student from school, city
Class : Class 10
Yes there is a problem in the question

Ans 4:

SOUVAGYA SAHA from De Nobili School, DHANBAD
Class : Class 10

Ans 5:

Adhrit from CHSV, Chennai
Class : Class 8
Why do things like this ALWAYS happen with sof?

Ans 6:

Hprakash09 from Billabong high Bhopal, Bhopal
Class : Class 7
ANSWER IS 16!!!

Ans 7:

Aniket kumar from kendriya vidyalaya, Delhi
Class : Class 8
actually! it is 32...........plz correct it

Ans 8:

Kavneet Kaur from Sat Paul Mittal School, Ludhiana
Class : Class 8
There is a problem in this question. Please correct this.

Ans 9:

Vasudha from PSBB KK Nagar, Chennai
Class : Class 8
Please correct the problem

Ans 10:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
How can you change 2 to 3? and how can you mark division symbol as addition and subtraction? SOF DON'T DO SUCH MISTAKES OR WE'LL HAVE TO REPORT IT TO sofworld.org

Ans 11:

Nimisha Tambe from Narayana vidyalayam, Nagpur
Class : Class 8
there is problem in the question.....pls correct it

Ans 12:

Thalavai Kannan from Geetanjali olympiad school, bangalore
Class : Class 4
its wrong!!!

Ans 13:

Tapan from San Academy, Chennai
Class : Class 8

Ans 14:

Adhrit from CHSV, Chennai
Class : Class 8
The divisions sign is used in 2 places, but I think it means subtraction because '-' meaning subtraction is not exactly coding anything...And in that case 20 8/4-3x2=20 2-6=16...Which is not an options for whatever weird reason

Ans 15:

Arav Agarwal from Pathways School Gurgaon, GURGAON
Class : Class 6
Ya there is a problem...............answer is 32 you seee

Ans 16:

Dheer Pandey from Sentia The Global School, Hyderabad
Class : Class 10
yes there is a problem in the question

Ans 17:

aditya arora from Heritage Experiential Learning School, gurugram
Class : Class 8
the division sign represents both addition and subtraction and we can get to different answers

Ans 18:

Pisal Dhruv from Veer Bhagat Singh International School, Mumbai
Class : Class 7
Then the calculation will turn to 20 +8/4x3x2, =20+2x3x2, =20+6x2, =20+12 =32, so there is a problem in the question

Ans 19:

Shreyans Mondal from Sri Chaitanya Techno School Kaggadasapura Campus 1, Bengaluru
Class : Class 10

Ans 20:

VYOM VIVEK PATEL from Doon Public School Bhuj, Bhuj Kuchchh
Class : Class 9
The answer should be 16

Ans 21:

Karthik Reddy Munnangi from Chirec International School, Hyderabad
Class : Class 8
This question is not correct, as the division symbol is used for both addition and subtraction.

Ans 22:

Kavitharini Joseph from HUS, Chennai
Class : Class 6
yes pls correct the problem...

Ans 23:

Aaditva from Vasant Valley School, New Delhi
Class : Class 8

Ans 24:

Joshua Sen from Montfort Senior Secondary School, Roorkee
Class : Class 10
division sign is both addition and subtraction....whyyyyyyy

Ans 25:

Advik from DPS Patna, Patna
Class : Class 4
yes there is an error in the question

Ans 26:

Ishayu Poddar from NPS Whitefield, Bangalore
Class : Class 8
answer should be 16 as - coded for subtraction doesn't really code anything so it is 22-6=16

Ans 27:

Shrutisri S G from Vyasa internationa school, bangalore
Class : Class 5

Ans 28:

Joe Bipin from National Public School Agra, Bangalore
Class : Class 10
the answer can be 31 and 13

Ans 29:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
WHY ARE YOU CONFUSING US AND WHY ARE YOU NOT PROVIDING CORRECT QUESTIONS AND WHY ARE YOU MAKING US LOSE OUR MARKS???????? SOF this is WRONG!!!!!!!!!!!!!!!!!

Ans 30:

Sahil Tejam from NPS Indiranagar, Bengaluru
Class : Class 6
There is problem in the Q as it mentions division sign represents both addition and substraction

Ans 31:

Subharsish Kashyap from Carmel school, Jorhat
Class : Class 8
There is a damn problem with this question .....Is this what I paid for?!?

Ans 32:

Garv Agarwal from Somerville School Noida, Noida
Class : Class 4
yes, and should be 32, which is not an option. Pl. correct this

Post Your Answer

SHEETAL SHREYA MANJUSHA SANTHOSH from INDIAN SCHOOL MULADHA, MUSCAT
Subject :IMO    Class : Class 10

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C.

In ΔAED, 
∠AE D + ∠EAD + 90° = 180° (Angle sum property) 
⇒ ∠AED + ∠EAD = 90° 
⇒ ∠EAD = 90° – ∠AED ...(i) 
Also, ∠EAD = (50° + ∠AFB) ...(ii) (Exterior angle property) 
From (i) and (ii), we have 
50° + ∠AFB = 90° – ∠AED 
⇒ ∠AFB + ∠AED = 90° – 50° = 40° 
⇒ ∠AED + ∠CFD = 40°


Ans 2:

Neha from Amity international, Delhi
Class : Class 10
C

Post Your Answer

Saloni Saini from JPHS, Jaipur
Subject :IMO    Class : Class 5

Post Your Answer

nimay gupta from Shiv Nadar School, noida
Subject :IMO    Class : Class 6

Ans 1:

Harshita Jain from CCA School, Gurugram
Class : Class 7
class:

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is A.

In the 1st column, 2 X 1 + 1 = 3,

In the 2nd column, 12 X 9 + 9 = 117

Similarly, In the 3rd column, 7 X 14 + 7 = 105

Hence, the missing number is 7.


Ans 3:

Kumar Krishiv from Apeejay School, Noida
Class : Class 8
ss

Ans 4:

Shaurya Verma from NPS HSR, Bangalore
Class : Class 9

Post Your Answer

nimay gupta from Shiv Nadar School, noida
Subject :IMO    Class : Class 6

Ans 1:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
No idea

Ans 2:

Sejal Mittal from dlf, ghaziabad
Class : Class 6

Ans 3:

Sejal Mittal from dlf, ghaziabad
Class : Class 6
C IS THE ANSWER

Ans 4:

Aarush Ranjan from Seth MR Jaipuria, Rooma Kanpur, Kanpur
Class : Class 6
no idea bruh

Ans 5:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
No idea

Ans 6:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
No idea

Ans 7:

Sarthak Manishkumar Lad from Seven Square Academy, Mumbai
Class : Class 7
Wrong

Ans 8:

Shaurya Verma from NPS HSR, Bangalore
Class : Class 9
C is the ans

Ans 9:

ARNAV MISHRA from delhi public school rohini, Delhi
Class : Class 6
no idea

Ans 10:

Pisal Dhruv from Veer Bhagat Singh International School, Mumbai
Class : Class 7
either a or d

Ans 11:

Afrin Dewan from St.Stephens School, Kolkata
Class : Class 7
C is the answer...

Ans 12:

Daanish from No 2 KV Gwalior , Gwalior
Class : Class 6
Question is irrelevant?

Post Your Answer