International Maths Olympiad Forum By SOF Olympiad Trainer - Page 524
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nimay gupta from Shiv Nadar School, noida
Subject :IMO    Class : Class 6

Ans 1:

ABHIRUP DEY SARKAR from K V COSSIPORE, KOLKATA
Class : Class 9
let each pencil costs x. So 5 pencil costs 5x Therefore 70-5x = y or -5x= y-70 or 5x=70-y or x= (70-y)/5

Ans 2:

ABHIRUP DEY SARKAR from K V COSSIPORE, KOLKATA
Class : Class 9
let each pencil costs x. So 5 pencil costs 5x Therefore 70-5x = y or -5x= y-70 or 5x=70-y or x= (70-y)/5

Ans 3:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
OK

Ans 4:

ABHIRUP DEY SARKAR from K V COSSIPORE, KOLKATA
Class : Class 9
let each pencil costs x. So 5 pencil costs 5x Therefore 70-5x = y or -5x= y-70 or 5x=70-y or x= (70-y)/5

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Shreyas Singh from Podar International School, Pune
Subject :IMO    Class : Class 5

Ans 1:

Nandini from Blue Ridge Public School, Pune
Class : Class 5
It is not B because Option:B is in ascending order. Correct answer is Option=C.

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Siddhi mehta from Manav Rachna International School, Gurgaon
Subject :IMO    Class : Class 6

Ans 1:

vaibhav from Narayana olympiad school , Chennai
Class : Class 6
The answer is any one of the four options i guess xD

Ans 2:

Aakshat Dey from GARDEN HIGH SCHOOL, KOLKATA
Class : Class 7

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kendre vaishnavi mangesh from podar international school , latur
Subject :IMO    Class : Class 1

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Vikram from AVM, Mumbai
Subject :IMO    Class : Class 5

Ans 1:

Mudit from The Cambridge school, Dhuri
Class : Class 5
c

Ans 2:

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

Ans 3:

Nandini from Blue Ridge Public School, Pune
Class : Class 5
C

Ans 4:

Nandini from Blue Ridge Public School, Pune
Class : Class 5
C

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Ira Agrawal from Sancta Maria International School, Hyderabad
Subject :IMO    Class : Class 4

Ans 1:

Shreeraj from ISWK, Muscat, Muscat
Class : Class 4
Option A

Ans 2:

Brinda Modi from Orchids International School, Pune
Class : Class 6

Ans 3:

AARNA GOEL from UPTON SCHOOL, ENGLAND
Class : Class 6
Option A Thank you from Aarna Goel

Ans 4:

IAMLOST from ABC, Pune
Class : Class 8
explain clearly

Ans 5:

Yatisha Goyal from Vibgyor High international School , Mumbai
Class : Class 5
check the solution

Ans 6:

Vivaan from Rustomjee Cambridge International School and Junior College, Mumbai
Class : Class 6

Ans 7:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
Actually I checked in New Guided Mathematics book 5 and I got formula for answer is 2*(L*B). So you can refer to this book. KEY - *= multiplication sign; L= length; B=breadth

Ans 8:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
Answer is correct but how? For this Question check the solution from SOF website or from your IMO Workbook. Actually I am not SOF and I myself did not understand how A

Ans 9:

Aarush Dey from M P Birla Foundation Higher Secondary School, Kolkata
Class : Class 8
the answer is not correct. Please respond.

Ans 10:

Shreeya Mangla from ASN Senior Secondary School, New Delhi
Class : Class 9
The answer is A as the breadth of the rectangle is 2 cm. The length of the rectangle is 5 so 2 minus 5 is 3 and if we divide it into two parts it is 2 and 1. So we need to plus 2,2,2,1,2,1,1,2,1,2,2,2 for the answer. The answer after adding these numbers is 20

Ans 11:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
option A is correct and it is clear from the SOF explanation

Ans 12:

Malavya Chaturvedi from Study Hall, Lucknow
Class : Class 8
Answer is not clear

Ans 13:

Soham Das from St. Joseph's School, Jiaganj
Class : Class 8
where is the breath

Ans 14:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
(continued) How a

Ans 15:

Arjun amit Naikare from Vikhe Patil Memorial School, Pune
Class : Class 4
please explain clearly . its not right

Ans 16:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
The answer does not have the breadth added to it.

Ans 17:

Yatisha Goyal from Vibgyor High international School , Mumbai
Class : Class 5
its option A

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Devika PARAMBIKATTIL from Rustomjee Cambridge International School , Thane
Subject :IMO    Class : Class 1

Ans 1:

Debarpan Das from Delhi Public School , Durgapur
Class : Class 9

Ans 2:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7
They said the 7th letter, 1, 3, and 9 are not letters.

Ans 3:

Malavya Chaturvedi from Study Hall, Lucknow
Class : Class 8

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Harini Srinivasan from Air Force School Hebbal, Bengaluru
Subject :IMO    Class : Class 5

Ans 1:

Harini Srinivasan from Air Force School Hebbal, Bengaluru
Class : Class 8
answer is C

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Krisha Sharma from New Gulf Indian School, Kuwait
Subject :IMO    Class : Class 1

Ans 1:

anu from Haralur, Bengaluru
Class : Class 5
BB

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

Ans 1:

Sourish Verma from NDPS, Indore
Class : Class 5

Ans 2:

Soorya Tej R from Delhi Public School, Hyderabad
Class : Class 4

Ans 3:

Tejas Kumar from Global Indian International School, Noida
Class : Class 5
The solution is wrong. Its 14 triangles.

Ans 4:

Nayanika Sadhish from CL Metha Sishya OMR, Chennai
Class : Class 8
The solution to this question is not correct. The solution is counting quadrilateral shapes as triangles.

Ans 5:

RAGHAV VARSHNEY from CITY MONTESSORI SCHOOL GOMTINAGAR LUCKNOW, Lucknow
Class : Class 7

Ans 6:

RAGHAV VARSHNEY from CITY MONTESSORI SCHOOL GOMTINAGAR LUCKNOW, Lucknow
Class : Class 7
The solution is wrong

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