International Maths Olympiad Forum By SOF Olympiad Trainer - Page 644
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YASH SAH from DELHI PUBLIC SCHOOL MIS DOHA, Doha
Subject :IMO    Class : Class 5

Ans 1:

NIRMAY JOSEPH from St Columba's School, New Delhi , New Delhi
Class : Class 9
everything is written in centimetre not in metre.

Ans 2:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
In the figure 'cm' is written, the solution has 'm' in it. SOF please correct it to avoid confusion.

Ans 3: (Master Answer)

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

Ans 4:

NEEV SINGH from VISHWA BHARATI PUBLIC SCHOOL, Noida
Class : Class 8
answer is c

Ans 5:

divish from Delhi Public School, gurgaon
Class : Class 5
all should be in cm or m question is wrong or else the answer is (d),(C),(a),(b)

Ans 6:

Shamvabi Samanta from Gitanjali Primary School,ICSE, Hyderabad
Class : Class 9
Question has been formed wrongly in terms of unit of measurement as all areas should either be in cm or in m.

Ans 7:

KUSHAGRA BANSAL from ST PAULS SCHOOL , Udaipur
Class : Class 6
The answer is C.

Ans 8:

divish from Delhi Public School, gurgaon
Class : Class 5

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YASH SAH from DELHI PUBLIC SCHOOL MIS DOHA, Doha
Subject :IMO    Class : Class 5

Ans 1:

TANVI DAS from GAIL DAV Public School , Dibiyapur
Class : Class 8
Answer is D, because 2m for EACH knot, so multiplying by 4 gives 8. Then adding to 120 gives answer 128. As this answer is not in options A, B and C, answer is D, none of these

Ans 2:

YASH SAH from DELHI PUBLIC SCHOOL MIS DOHA, Doha
Class : Class 8

Ans 3:

Fareeha siddiqua from Janki Devi public school , Mumbai
Class : Class 5
option d according to SOF but it should be option c as it has said for the knots. The word ''knots'' is in plural form which means there are many knots which means it will be a l the knots counted

Ans 4:

Tejas Agarwal from Prudence School , New Delhi
Class : Class 10
I agree with answer 14

Ans 5:

from kalyan, Kalyan
Class : Class 6
The answer is (D)

Ans 6:

Dhruva from VSSIPS, Bangalore
Class : Class 8
118 sq.cm

Ans 7:

Kurma Krishna chaitanya from Defence Laboratory School RCI, Hyderabad
Class : Class 7
128 sq cm

Ans 8:

Dhruva from VSSIPS, Bangalore
Class : Class 8
None of these

Ans 9:

Akshaj V from PSBB Senior Secondary School, Chennai
Class : Class 6

Ans 10:

Shreyas Vinod from EUROSCHOOL WHITEFIELD, BANGALORE
Class : Class 9
Answer should be Option C, not D, because 2 meter for knots is mentioned. It is not mentioned that 2 m is required for each knot.

Ans 11:

Dhruva from VSSIPS, Bangalore
Class : Class 8
118 sq.cm

Ans 12:

Rudra Tripathi from DPS Noida, Noida
Class : Class 10
The answer is A

Ans 13:

Gaurav Gupta from DPS International Gurgaon, Gurgaon
Class : Class 5
Answer is C: 122. It says 2m is required for tying the "knots" which means 2m is the total length consumed the all knots. Had it said that 2m is required for each knot then the answer would be 128m.

Ans 14:

Siddarth Rastogi from Greenwood High Int'l School, Bangalore
Class : Class 5
Answer: 128Explanation:Perimeter = 30 x 4 = 120Space for knots = 2 x 4 = 8 (each knot = 2m)Total (answer) = 30 x 4 2 x 4 = 128 m 128 > 120, 118 or 122 so option D. None of these is the correct option

Ans 15:

Shivsnsh from aps, udhampur
Class : Class 6
Ans is 122 (4×30=120 2=122

Ans 16:

Dhruva from VSSIPS, Bangalore
Class : Class 8
Option A

Ans 17:

Aditri Sultania from RBK Global School, Mumbai
Class : Class 5
In the question it is written 2m for knots, which means 122m of rope is required. If it would be given 2m for each knot then the answer is 128m.

Ans 18:

Samarth Sabari from GIIS, Singapore
Class : Class 9
All knots or each knot?

Ans 19:

from kalyan, Kalyan
Class : Class 6

Ans 20:

Pratham Dave from GNS, Bangalore
Class : Class 7
C is the answer to this question but it is showing that D is the answer. Master answer required

Ans 21:

Raaya Acharya from Kendriya Vidayala DRDO, BANGALORE
Class : Class 5
c

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YASH SAH from DELHI PUBLIC SCHOOL MIS DOHA, Doha
Subject :IMO    Class : Class 5

Ans 1:

J Srinidhi from narayana, Hyderabad
Class : Class 7
The correct answer is B.

Ans 2:

J Srinidhi from narayana, Hyderabad
Class : Class 7
SolutionArea of larger rectangle = (22 × 8) sq. cm= 176 sq. cmArea of unshaded rectangle = (7 × 6) sq. cm= 42 sq. cmArea of square = (4 × 4) sq. cm = 16 sq. cm∴ Area of shaded region= 176 sq. cm – (42 16) sq. cm= 118 sq. cm

Ans 3: (Master Answer)

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

Ans 4:

J Srinidhi from narayana, Hyderabad
Class : Class 7

Ans 5:

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

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sasthree from Jain Heritage Kondapur, Hyderabad
Subject :IMO    Class : Class 4

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Gireesha from innocent hearts school jalandhar, Jalandhar
Subject :IMO    Class : Class 4

Ans 1:

Aarathy Sudhir Aarav Sudhir from Global Indian International School, Abu Dhabi
Class : Class 7
IT'S A BIT HARD

Ans 2:

Dhruva from VSSIPS, Bangalore
Class : Class 8
26

Ans 3:

Aryan Jain from greenwood high, Bangalore
Class : Class 5
A-26

Ans 4:

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

Ans 5:

Krittibas Bhattacharjee from Achiever's Academy , Bangalore
Class : Class 6
easy

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Akshita aswal from Tender heart school, Chandigarh
Subject :IMO    Class : Class 6

Ans 1:

Yashraj from pps, pune
Class : Class 6
bbbbbbbbb

Ans 2: (Master Answer)

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

Ans 3:

T Chiranjeevi from AKG Public School, Chennai
Class : Class 8
the answer should be B because if we multiply we will get the same answer this is my comment

Ans 4:

Kaustubh varikallu from South Forsyth Middle School, Atlanta
Class : Class 7

Ans 5:

Ananya Tiwari from Sapphire International School, Ghaziabad
Class : Class 7

Ans 6:

Arun Kumar Dash from K V Khurda Road, khurda
Class : Class 6

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tanishka Bondhare from Saraswati international school , Hingoli
Subject :IMO    Class : Class 8

Ans 1: (Master Answer)

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

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tanishka Bondhare from Saraswati international school , Hingoli
Subject :IMO    Class : Class 8

Ans 1:

tanishka Bondhare from Saraswati international school , Hingoli
Class : Class 8
Explain it..... Plz..... Help me out of it

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RAYAN NAJEEB from Delhi public school, RIYADH
Subject :IMO    Class : Class 1

Ans 1:

Sana from Sboajc , Chennai
Class : Class 2
D

Ans 2:

Jaytra Lohia from Lotus valley international school, noida, Noida
Class : Class 5
The answer is D

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Prashanth from Gems Modern Academy, Dubai
Subject :IMO    Class : Class 4

Ans 1:

Dhruva from VSSIPS, Bangalore
Class : Class 8
8/26

Ans 2:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Areen is correct

Ans 3:

AREEN from BOLTON SCHOOL, Secunderabad
Class : Class 5
The answer is A as the question says that Yashika has 8 red marbles in her bag.

Ans 4:

Sashrika Pasunoori from KV Gachibowli, Hyderabad
Class : Class 5
Areen copied the answer from Google.

Ans 5:

AREEN from BOLTON SCHOOL, Secunderabad
Class : Class 5
The answer is A as the question says that Yashika has 8 red marbles in her bag.

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