International Maths Olympiad Forum By SOF Olympiad Trainer - Page 623
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tanmay srivastava from DPS Noida, Noida
Subject :IMO    Class : Class 4

Ans 1:

Arin Malhotra from Rajkumar college Raipur, Raipur
Class : Class 7
B

Ans 2:

Prerna Singh from Loyola School, Jamshedpur
Class : Class 5
The correct answer would be option C because CM = 900. C=100, M=1000. So, the smaller no. is in the beginning, it will be minus. So, 1000-100 is the correct ans.

Ans 3:

Arnav Vashisth from GD GOENKA PUBLIC SCHOOL, Delhi
Class : Class 5
The correct answer is b

Ans 4:

KALLOL PAL from TIGPS Mankundu , CHANDANNAGAR
Class : Class 9
c=100,M=1000 so cm =100-1000 (answer. c)

Ans 5:

Ankit Kumar Mistry from Kalyani Public School, Kolkata
Class : Class 7
The answer is B because CM=C-M=C(100)-M(1000)We cannot subtract 100-1000 So the formula should be 1000-100 l Therefore, TH H T O 1 0 0 0 - 1 0 0 ----------------------- 9 0 0 So, B is the right answer.

Ans 6:

Aneesh Balaji from BVBARR school, Hyderabad
Class : Class 9
b is the answer

Ans 7:

Supreeth from Sssbj, Bangalore
Class : Class 6
A

Ans 8:

Mohammad Zamam Ansari from Billabong International High School, Bhopal
Class : Class 1
bakwaas question hai

Ans 9:

Swarit from Indian School Wadi kabir, Muscat
Class : Class 6
The correcr answer is B CM = 1000 – 100.

Ans 10: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correcr answer is B

CM = 1000 – 100.


Ans 11:

Supreeth from Sssbj, Bangalore
Class : Class 6
A

Ans 12:

Ivan Tyagi from Chirec International School , Hyderabad
Class : Class 8
a

Ans 13:

Ashwak from Cambridge, Jalandhar
Class : Class 9
B is the correct answer because we cannot subtract 1000 from 100

Ans 14:

MANDAR PALKAR from KV DRDO, Bengaluru
Class : Class 2
CM=1000-100

Ans 15:

Twisha Arora from Modern Vidya Niketan, Sector - 17, Faridabad, Haryana, FARIDABAD
Class : Class 7
The correct option feeded into the question is wrong. It should be C, but the correct answer in this is B!

Ans 16:

Vanishi Jain from DELHI PUBLIC SCHOOL, Noida
Class : Class 4
If there is C before M that means that we are subtracting 100 from 1000 . We write it as 1000 - 100. Answer : B

Ans 17:

Shaurya agrawal from kothari international school, pune
Class : Class 7

Ans 18:

Arin Malhotra from Rajkumar college Raipur, Raipur
Class : Class 7
B

Ans 19:

Rozan nirmali from GIIS, japan
Class : Class 7
The correct answer is option B.

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Arjun Gourineni from CHIREC International School, Hyderabad
Subject :IMO    Class : Class 2

Ans 1:

Anshul Sameer Darne from Ryan International School, Masdar
Class : Class 6
C40 is the answer.

Ans 2:

Om Mahajan from StarChild Academy, Orlando
Class : Class 1
C

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C

363 - 323 = 40


Ans 4:

Shrihan Modi from Delhi Public School Noida , Noida
Class : Class 4
C

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Atharva Panjabi from BAL BHARATI PUBLIC SCHOOL DWARKA, New Delhi
Subject :IMO    Class : Class 5

Ans 1:

Atharva Panjabi from BAL BHARATI PUBLIC SCHOOL DWARKA, New Delhi
Class : Class 4

Ans 2:

Viggya Sutradhar from New look Senior Secondary school, Banswara
Class : Class 8
8*5-3*4=28 12*7-9*8=12 5*5-1*6=19 So correct and is 1 D option

Ans 3:

ARADHYA AGARWAL from NEW ERA PROGRESSIVE SCHOOL, Korba
Class : Class 8
Answer is [D] 1

Ans 4:

Preya from New Horizon Gurukul, Bangalore
Class : Class 5
ya

Ans 5:

Atharva Panjabi from BAL BHARATI PUBLIC SCHOOL DWARKA, New Delhi
Class : Class 4
please show the correct explaination.

Ans 6:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9

Ans 7:

Aarya Teja from Bharatiya Vidya Bhavans Public School, Hyderabad
Class : Class 6
(D) 1 1st number=(8*5)-(4*3) =40-12 =28 2nd number (12*7)-(9*8) =84-72 =12 Therefore, 3rd number=(5*5)-(6*1) =25-6 =19

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Shiven Dinkar from DPS NOIDA Sector 30, Delhi
Subject :IMO    Class : Class 3

Ans 1:

Saanvi from DPS INTERNATIONAL SCHOOL, Singapore
Class : Class 4
( B ) is the answer 😁

Ans 2:

Naitik from Billabong High International School, Noida
Class : Class 5
b

Ans 3:

Amarjit Pattanaik from velammal, Chennai
Class : Class 8
The answer is B.

Ans 4:

Amarjit Pattanaik from velammal, Chennai
Class : Class 8
The answer is B

Ans 5:

Adya gupta from DPS, RKP
Class : Class 2
B

Ans 6:

Girish Garg from Delhi public school, Bathinda
Class : Class 3
B

Ans 7:

Aditya Raj from Kairali School, Ranchi
Class : Class 6
B

Ans 8:

Amarjit Pattanaik from velammal, Chennai
Class : Class 8

Ans 9:

Lavith karn from Euro school wakad, pune
Class : Class 3
The anwer is B

Ans 10:

Avik Arya from Trileaves Global school , Chennai
Class : Class 3
B/D

Ans 11:

Girish Garg from Delhi public school, Bathinda
Class : Class 3
B

Ans 12:

Urvee Sarang Gokhale from Sri Sri Ravi Shankar Vidya Mandir, Pune
Class : Class 5
B is the correct answer.

Ans 13:

Amarjit Pattanaik from velammal, Chennai
Class : Class 8
The answer is B.

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Atharv Deshmukh from Podar international school, Aurangabad
Subject :IMO    Class : Class 7

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Kindly repost the correct question


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Swapnil Ganguly from Salt Lake School , Kolkata
Subject :IMO    Class : Class 9

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is A.

Given a right angled ΔABC,
where AB = AC and CD is the bisector of ∠C. 
 


Ans 2:

Gauransh Gupta from Manavsthali School R-block, NEW DELHI
Class : Class 5

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Kushagra Gupta from Manav Rachna, Faridabad
Subject :IMO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is D.


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Seshasayee sudharsan from PSBB Learning Leadership Academy, Bangalore
Subject :IMO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

In mathematics, 'e' is a constant that is the base of the natural logarithm. It is the unique number whose natural logarithm is equal to one and its value is approximately 2.71828.


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AARAV GUPTA from Khaitan Public School, Ghaziabad
Subject :IMO    Class : Class 3

Ans 1:

Vedant Chhabra from Blue Ridge Public School , Pune
Class : Class 5

Ans 2:

Vedant Chhabra from Blue Ridge Public School , Pune
Class : Class 5

Ans 3:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
You have not told that once a person has done handshake with the other people , his /her handshake will not be taken again.

Ans 4: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C.

Handshakes by the first child = 6 (with remaining 6 children)

Handshakes by the second child = 5 (as the handshake with the first child is already counted)

Then, handshakes by the third child = 4 (as the handshakes with the first and second child are already counted)

Similarly, handshakes by the fourth, fifth and sixth child are 3, 2 and 1 respectively.

Since, the last child's handshakes are already counted, he/she will not make any new handshakes.

Therefore, a total of (6 +5 +4 + 3 + 2 + 1) = 21 handshakes took place.


Ans 5:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
No answer is C admin is right

Ans 6:

Yatharth from DPS, VADODARA
Class : Class 4

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Parth Thakkar from Mount Literal Zee School, Ahmedabad
Subject :IMO    Class : Class 6

Ans 1:

ARKA ALOK GANGOPAADHYAY from GARDEN HIGH SCHOOL , KOLKATA
Class : Class 7
Answer is B

Ans 2:

Parth Thakkar from Mount Literal Zee School, Ahmedabad
Class : Class 9
The answer is option B but you have typed 30000 but the answer is written is 3000

Ans 3:

akshanjaswal from Modern Delhi International School, Faridabad
Class : Class 10
2X(5X20X15) =3000, so B is the answer

Ans 4:

Pisal Dhruv from Veer Bhagat Singh International School, Mumbai
Class : Class 7
then the question turns to 2x(5x20x15) =30000, hence B is the correct answer

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