International Maths Olympiad Forum By SOF Olympiad Trainer - Page 560
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Aditya Sai Vemparala from Amanora school, Pune
Subject :IMO    Class : Class 7

Ans 1:

Vartika Agarwal from Phoenix world school, Pune
Class : Class 9

Ans 2:

Ashfaq Mohamed from Private International English School, Abudhabi
Class : Class 10

Ans 3:

anay rungta from national public school yeshwanthpur, Bengaluru
Class : Class 9
TOTAL AREA OF FIGURE= 1/2 PI R^2= 1/2*14*14*22/7=308CM^2 AREA OF WHITE ARE= PI R^2 22/7*7*7=154 cm^2 THEREFORE RE O SHADED REGION= 308-154=154 CM^2 OPTION C IS CORRECT

Ans 4:

Vartika Agarwal from Phoenix world school, Pune
Class : Class 9
the answer is correct....your calculations might be wrong

Ans 5:

Aarav Srivastav from DWPS , Noida Extension
Class : Class 7
the answer is wrong

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Mystic Girl from NPS, Bnagalore
Subject :IMO    Class : Class 5

Ans 1:

Prateeshtha Ghosh from Samhita Academy, Bangalore
Class : Class 8
D

Ans 2:

Mystic Girl from NPS, Bnagalore
Class : Class 6
It is D because 11 6=17and 17x17 is 289.

Ans 3:

OISHIK KUNDU from Delhi Public school North kolkata, baranagar
Class : Class 4
Let’s see what pattern is being followed by the numbers in the above grid. Let’s take the first column – 7, 81, 2 If we add 1st and 3rd number = 7 2 = 9 And if we multiply 9 by 9 itself = 9 x 9 = 81. 81 is the 2nd number in the first column. Let’s see if the numbers in second column follow the same pattern. 9, 169, 4 We add 1st and 3rd number = 9 4 = 13 We multiply 13 by 13 itself = 13 x 13 = 169. 169 is the 2nd number in the second column. That means the numbers of third column will follow the same pattern. 11, ?, 6 We add 1st and 3rd number = 11 6 = 17 We multiply 17 by 17 itself = 17 x 17 = 289. 289 will be the missing number in the third column. So, the correct answer is Option D.

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swanand from Maharashi vidya mandir, Hyderabad
Subject :IMO    Class : Class 6

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
option C is the answer as when you fold each of the other figures (opt. a, b, d), you will get the same cuboid as asked in the question. But in the third option, when you fold the figure along the lines, you will get a cuboid whose one face is missing..... So, this is the explanation :)

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Kavitharini Joseph from HUS, Chennai
Subject :IMO    Class : Class 5

Ans 1:

Hitanshi Behera from Loyola School , Bhubaneswar
Class : Class 4
it is not a math problem it is an eye test

Ans 2:

Arshi Jain from DPS noida, New Delhi
Class : Class 5
yes it should be 28 kg

Ans 3:

Sourish Mahakul from Delhi Public School Electronic City, Bengaluru
Class : Class 8
its c

Ans 4:

KUSHAGRA BANSAL from ST PAULS SCHOOL , Udaipur
Class : Class 6

Ans 5:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is C because the arrow is facing just after 2 small lines from 25 kg.

Ans 6:

Aarya Teja from Bharatiya Vidya Bhavans Public School, Hyderabad
Class : Class 6
(d) 28 kg Just use your brain. If you are using this app in a computer, then you can zoom in

Ans 7:

Tanishq Lotake from Bishop school, Pune
Class : Class 5
The Ans should be 28

Ans 8:

Prateeshtha Ghosh from Samhita Academy, Bangalore
Class : Class 8

Ans 9:

Mohammed Najl from Credence high school Dubai, Dubai
Class : Class 5
the answer should be D.

Ans 10:

swastik Biswal from St Joseph Convent Higher Secendary school, Sambalpur
Class : Class 5

Ans 11:

Mohammed Najl from Credence high school Dubai, Dubai
Class : Class 5
oh, it is actually 25 but it looks like 26.

Ans 12:

TANVI DAS from GAIL DAV Public School , Dibiyapur
Class : Class 8
Guys, that is not 25, it is 26. So, answer is 28

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Mani Gupta from Carmel Convent School, Faridabad
Subject :IMO    Class : Class 8

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Mani Gupta from Carmel Convent School, Faridabad
Subject :IMO    Class : Class 8

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Mani Gupta from Carmel Convent School, Faridabad
Subject :IMO    Class : Class 8

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Mani Gupta from Carmel Convent School, Faridabad
Subject :IMO    Class : Class 8

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Mani Gupta from Carmel Convent School, Faridabad
Subject :IMO    Class : Class 8

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Aditya Sai Vemparala from Amanora school, Pune
Subject :IMO    Class : Class 7

Ans 1:

Varsha.K from DAV Public School - Velachery, Chennai
Class : Class 5
The option b states that a unique triangle is constructed and it is possible to do so. However option c states that we CANNOT construct the angle 7.5. This is false cause it can be constructed by bisecting an angle of 60, three times.

Ans 2:

Bhavtosh Tripathi from Maneckji Cooper Education Trust School, Mumbai
Class : Class 9
Aditya that is the very reason why it will be a unique triangle and option C is correct since it an angle such as that can be created by bisecting 60 degree three times

Ans 3:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 4:

Joshua Sen from Montfort Senior Secondary School, Roorkee
Class : Class 9
a is correct (ez)b is INCORRECT (angles can be same but size can vary)c is correct (bisect 60 degrees 3times)answer should be b

Ans 5:

Shaashwata Paul from Genesis International School, Hyderabad
Class : Class 8
ans is b.i agree with aditya

Ans 6:

Adhrit from CHSV, Chennai
Class : Class 8
Both B and C are wrong, so one of the options definitely needs do be changes. Someone please look into this.

Ans 7:

Chaitanya L K from SKCHEC, bangalore
Class : Class 8
answer is D....

Ans 8:

Medha Bijjaram from Prime Academy, Mumbai
Class : Class 9

Ans 9:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 10
Answer is b as the length of sides of triangle are variable and therefore unique triangle cannot be constructed

Ans 10:

Himanish Basu from Army Public School Kamaraj Road, Bangalore
Class : Class 7

Ans 11:

shaurya aggarwal from scholars rosary senior secondary school, rohtak
Class : Class 9
both B and C are correct as angle 7.5 can be constructed using compass and ruler and we cant construct a unique triangle with only 3 angles given.

Ans 12:

UTKARSH SAWARN from AIR FORCE SCHAOOL AMBALA CANTT, AMBALA CANTT
Class : Class 8
ya guys the answer is D

Ans 13:

Tamrashi Pani from National Public School, Bangalore
Class : Class 8
It is meant to be c

Ans 14:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 10

Ans 15:

Kushal from Chirec, Hyderabad
Class : Class 7

Ans 16:

Kavyam Rustagi from Delhi Public School, Ethalbari , Binnaguri
Class : Class 4

Ans 17:

Tamrashi Pani from National Public School, Bangalore
Class : Class 8
I mean B

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