International Maths Olympiad Forum By SOF Olympiad Trainer - Page 561
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NYRAH GUPTA from Sat Paul Mittal School, Ludhiana
Subject :IMO    Class : Class 4

Ans 1:

Hitansh Menon from Goldcrest High Vashi, Vashi
Class : Class 4
Yes

Ans 2:

Ashwak from Cambridge, Jalandhar
Class : Class 8
The options are misprinted !!!!!

Ans 3:

SRINIKA PARIAL from MBSV, KOLKATA
Class : Class 4
solution not given in a proper manner

Ans 4:

Dheer Pandey from Sentia The Global School, Hyderabad
Class : Class 10
yes,please rectify the question but maybe b is the answer.

Ans 5:

RITASHREE ROY from VMS JOKA, KOLKATA
Class : Class 8
I think the answer is b

Ans 6:

BISWADITYA TRIPATHY from Delhi public school Bangalore east, Bangalore
Class : Class 4
https://balkonline.ru/uteplenie-balkona.html

Ans 7:

ANAY GUPTA from CMS KANPUR ROAD LUCKNOW, LUCKNOW
Class : Class 8
minus sign is missing

Ans 8:

Gaurav Mittal from Jaipuria School, Ghaziabad
Class : Class 3
"-" sign is missing in b

Ans 9:

Navya Vats from Saint Xavier High School, Noida Extension
Class : Class 7
''-'' is missing in B as well as D.

Ans 10:

FIONA SAHA from The Heritage School Rampurhat west Bengal India, Rampurhat Birbhum
Class : Class 4
In D minus sign is not given

Ans 11:

Rayyaan Shetty from MRV Bandra West , Mumbai
Class : Class 8
In the solution there is a sign but in the question ther is no sign in B D

Ans 12:

Shruti Agarwal from dpsnoida, Noida
Class : Class 4
options misprinted too

Ans 13:

Aadi from Delhi Public School , golaghat
Class : Class 7

Ans 14:

Shruti Agarwal from dpsnoida, Noida
Class : Class 4
sign is missing in B and D options

Ans 15:

Shrey Sanmay from open minds a birla school, patna
Class : Class 6
b

Ans 16:

Tanav Jain from GCC International School, Thane
Class : Class 3

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naman from PSBBM, Chennai
Subject :IMO    Class : Class 5

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Akanksha from Rashtrotthana Vidya Kendra, Bengaluru
Subject :IMO    Class : Class 6

Ans 1:

Ashwak from Cambridge, Jalandhar
Class : Class 8
The ans is B

Ans 2:

Sejal Mittal from dlf, ghaziabad
Class : Class 6
The net B will form given cube So ans will be- B

Ans 3: (Master Answer)

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

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Divyanshu from APS DK, Delhi
Subject :IMO    Class : Class 7

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Divyanshu from APS DK, Delhi
Subject :IMO    Class : Class 7
yo

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Rishit Verma from CMR NPS, Bengaluru
Subject :IMO    Class : Class 6

Ans 1:

Ankush Ghosh from DPS, Doha
Class : Class 10
But they asked how many tilesThe side of one tile is 15cmso if you divide 225x30 (area of the floor)by 15x15 ( area of one tile) you get 30 so 30 is the answer

Ans 2:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 9
found the solution! the answer is correctif we find hcf of 225 and 30 , WE ARE FINDING OUT THE LENGTH OF ONE SIDE OF A TILE , NOT THE NO. OF TILESTHEN , WE FIND THE AREA OF ONE TILE , THAT IS 15*15=225NOW, DIVIDE THE AREA OF PLOT BY AREA OF ONE TILE .YOU WILL GET THE ANSWER I.E 30

Ans 3:

Arpan Kumar from Johnson Grammar School, Secunderabad
Class : Class 6
30 is the answer.

Ans 4:

mathangi jp from vbc, trichy
Class : Class 6

Ans 5:

Priyam Bhattacharya from cambridge court high school, jaipur
Class : Class 6
those who have written 30 have no brains

Ans 6:

Bhavtosh Tripathi from Maneckji Cooper Education Trust School, Mumbai
Class : Class 9
The answer should be 15 as 225 is not divisible by 30

Ans 7:

Aditeya Goyal from Delhi Public School Chandigarh, Chandigarh
Class : Class 6
Yes 30 should be the answer

Ans 8:

mathangi jp from vbc, trichy
Class : Class 6

Ans 9:

ansh rai from delhi public school, Bhilai
Class : Class 4
Obviously it should be 15 how 225 is supposed to be divisible by 30 without integers so dedinetly answer is 15

Ans 10:

SIVAVEERAKRISHNAN S from CHETTINAD VIDHYASHRAM, Chennai
Class : Class 8
it is 30

Ans 11:

Kumar Krishiv from Apeejay School, Noida
Class : Class 8
The answer should be 30 because they have asked number of tiles

Ans 12:

Ashwak from Cambridge, Jalandhar
Class : Class 8
It should be 15 because the area is not divisible by 15 ........... ALSO if the area be divisible by 30 , but they asked the least number of tiles ......so it cannot be 30 at all

Ans 13:

SIVAVEERAKRISHNAN S from CHETTINAD VIDHYASHRAM, Chennai
Class : Class 8

Ans 14:

Ashwak from Cambridge, Jalandhar
Class : Class 8
IT should be 15

Ans 15:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
the answer should be 30. the side of one tile is 15 cm ,but they have asked the tile so it should be 30 only . and those who say that children who are having the answer30 have no brains they only don't have brains

Ans 16:

Ashwak from Cambridge, Jalandhar
Class : Class 8
It should be 15

Ans 17:

VYOM VIVEK PATEL from Doon Public School Bhuj, Bhuj Kuchchh
Class : Class 8
the answer must be 30 but checking by calculating 15 is wrong. The answer= (225x30)/30=30

Ans 18:

Myra Negi from DPS Noida, Noida
Class : Class 7
Guys see the solution

Ans 19:

PVPwarrior from B, Chennai
Class : Class 9
The answer is C. 15 tiles.

Ans 20:

Devang Shukla from Ryan Christian School, Mumbai
Class : Class 9
The answer is A,30 tiles

Ans 21:

ABHIRAM from chirec, HYDERABAD
Class : Class 10
its 15

Ans 22:

Devika Modi from Ahlcon International School, Delhi
Class : Class 6
I also agree to arijit

Ans 23:

ARIJIT SINGH from SAT PAUL MITTAL SCHOOL , Ludhiana
Class : Class 7
It should be 15 because the area is not divisible by 30

Ans 24:

Faraz Khan from Rassaz International, Mumbai
Class : Class 6
I agree to Arjit. It should be 15 because 225 is not divisible by 30

Ans 25:

Veda Dua from Delhi Public School, R. K. Puram, New Delhi
Class : Class 8

Ans 26:

Anirudh Rayasam from DPS East, Bangalore
Class : Class 7
This one has too many mixed answers. SOF has to give the master answer in simple english

Ans 27:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 9
you should all think a bit(mine answer is also gicen wrong) and read the question properly , I THINK WE SHOULD TRY TO FIND OUT THE NO. OF TILES BY TAKING HCF OF 225 AND 30 . REASONS1)BECAUSE THE CHAPTER IS ABOUT NO. CALCULATION , NOT MENSURATION2) YOU DO NOT HAVE A DEFINITE METHOD BY FIRST FINDING THE AREA AND THEN DOING ALL THESE THINGS . THIS METHOD DOES NOT MAKE SENSEso , first of all , we should try out with hcf best of luck!

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Prachi from Holy Child Public school, Faridabad
Subject :IMO    Class : Class 3

Ans 1:

Varesh Hemwani from R.D Public School Betul, betul
Class : Class 3
(A)

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shaurya thakur from DLF Public School, Sahibabad
Subject :IMO    Class : Class 4

Ans 1:

Vismaya Vinod from GEMS new millemium al khail, Dubai
Class : Class 2
C

Ans 2:

ANWESHA THAKUR from DPS SECTOR 132 NOIDA, NOIDA
Class : Class 7
C

Ans 3:

ANWESHA THAKUR from DPS SECTOR 132 NOIDA, NOIDA
Class : Class 7

Ans 4:

Shruti Agarwal from dpsnoida, Noida
Class : Class 4
yeah C grinder

Ans 5:

RITASHREE ROY from VMS JOKA, KOLKATA
Class : Class 8
yes c because according to the question oven is called grinder

Ans 6:

Dhruv Khandelwal from Disha Delphi Public School , Kota
Class : Class 9
C-grinder

Ans 7:

digamber12 from st francies xavier english medium school ajgaon, sawantwadi
Class : Class 4
Grinder

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RITASHREE ROY from VMS JOKA, KOLKATA
Subject :IMO    Class : Class 4

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RITASHREE ROY from VMS JOKA, KOLKATA
Subject :IMO    Class : Class 4

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