National Science Olympiad Forum By SOF Olympiad Trainer - Page 159
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Ayushman Garg from N.K Bagrodia Public school, Delhi rohini
Subject :NSO    Class : Class 6

Ans 1:

tyt from saltlake school, kolkata
Class : Class 6

Ans 2:

Anish Kumar from Dehli Public School, Bopal, Ahmedabad
Class : Class 7
The earth's north pole acts like a south pole to the magnet as it attracts the north pole of a magnet (The earth's north pole attracts the north pole of a magnet). This means that the needle of a compass is always the north pole. So, the needle will point to the south pole of the other magnet. In simple words, the North pole of the earth is actually the south pole for a magnet.

Ans 3:

Ayaansh Gaur from Neerja Modi school, Jaipur
Class : Class 6
The needle should point towards South pole because the Earth's North Pole is actually the South pole of a bar magnet. Compass needle always points to the geographical North pole.

Ans 4:

Eksha from JBM GLOBAL SCHOOL, Noida
Class : Class 6
shall be BBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 5:

Sumita Kundu from Vels Global School , Kolkata
Class : Class 6

Ans 6:

georgy mathew from St thomas residential school, Trivandrum
Class : Class 6
But a compass always points to the magnetic north pole, not geographic north pole right?

Ans 7:

Einya Prasad Mhatre from Thakur School Of Global Education , Mumbai
Class : Class 6
Shouldn't the correct answer be (A), since a compass needle ALWAYS points in the North Direction? Pls Help.

Ans 8:

Olipriya Bhattacharjee from South Point High School, Kolkata
Class : Class 6
North and South attract each other. Since the compass is placed in the middle of the bar magnet and not ON it and the North pole of the compass needle can face the South pole of the magnet diagonally only, should not the correct answer be C? Also, the north pole of the Earth's magnetic field should not come into consideration here, I think.

Ans 9:

Sahanaa from Sancta Maria International School, Hyderabad
Class : Class 8

Ans 10:

hari teja from st andrews high school,, secunderabad
Class : Class 6
it should be ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

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Advika Singh from The Tribhuvan School, Patna
Subject :NSO    Class : Class 8

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Aman singh from Service convent sr. sec school, Narmadapuram
Subject :NSO    Class : Class 6

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geethasree from Carmel School, Banglore
Subject :NSO    Class : Class 6

Ans 1:

Sahanaa from Sancta Maria International School, Hyderabad
Class : Class 8
Does anyone understand this?

Ans 2:

Eksha from JBM GLOBAL SCHOOL, Noida
Class : Class 6
Should be ( as 12 2

Ans 3:

Kaushik shekhar patra from St. arnold's school, Rourkela
Class : Class 7
The answer should be 9

Ans 4:

Saharay Megha Shirsendu from Sabari Vidyalaya, Vadodara
Class : Class 8
Correct answer is 9m. Already explained in olympaid prep-guide book.

Ans 5:

AUSTIN from Viswajyothi CMI Public School, Chowara
Class : Class 7
it is 9m as 12m - 5m = 7m , 7m 2m = 9m , kindly the correct answer is 9m .

Ans 6:

Arihant Medhi from Dps Barasat, Kolkata
Class : Class 8
Yes austin

Ans 7:

JULFIKAR CHOWDHURY from Apeejay Nerul, mumbai
Class : Class 8
Please explain

Ans 8:

Abhijit kumar from Xavier school, Jamshedpur
Class : Class 6
9 should be the answer

Ans 9:

Eksha from JBM GLOBAL SCHOOL, Noida
Class : Class 6

Ans 10:

Soham Thalpati from Podar International School, Ambegaon, Pune
Class : Class 6
please explain

Ans 11:

geethasree from Carmel School, Banglore
Class : Class 8
Can anyone please explain?

Ans 12:

Arush Singh from DPS Kashi, Varanasi
Class : Class 6
explain

Ans 13:

Avighna Shastri from doha modern indian school, doha
Class : Class 2
12-5 =7 7 2=9answer is 9

Ans 14:

Vedang Shridhar Sasturkar from Vasant Valley School, New Delhi
Class : Class 7
Tis is not in synopsis

Ans 15:

Harsha Godithi from B V M GLOBAL, Chennai
Class : Class 6

Ans 16:

from ,
Class :
Please give more questions like this

Ans 17:

AUSTIN from Viswajyothi CMI Public School, Chowara
Class : Class 7

Ans 18:

Rachita Gupta from New Era Higher Secondary School, Vadodara
Class : Class 7
the distance in the mirror of boy y would be 9m but distance from mirror to boy x would be 9 plus 2= 11

Ans 19:

Shivani from DPS North school , Bangalore
Class : Class 7
It's nine.

Ans 20:

Vedang Shridhar Sasturkar from Vasant Valley School, New Delhi
Class : Class 7

Ans 21:

Vatsal Gupta from Mondrian House, DEHRADUN
Class : Class 6
Kindly explain.......

Ans 22:

Vriksh Roy Meharia from DPS Bangalore East, bangalore
Class : Class 7

Ans 23:

Srijato Bhattacharya from The Global Edge School, Kokapet Branch, Hyderabad
Class : Class 6
Here it is asking how far away boy Y would APPEAR to be in the mirror to boy X, as in, from boy X's perspective. Y is 12 m away from the MIRROR. He moves 5 m closer12-5=7This is where confusion may set in. A lot of people have added X's distance from the mirror(2 m)7 2=9Here, we are getting the total as 9 m.. However, it is also necessary to add 2 m for the reflected ray to travel to X so that he can see the image.9 2=11Hence, the answer is 11 m.

Ans 24:

Rachita Gupta from New Era Higher Secondary School, Vadodara
Class : Class 7
answer should be 9

Ans 25:

Shivani from DPS North school , Bangalore
Class : Class 7
@Rachita Gupta- They are asking how far away boy-y would appear to be from BOY-X not the mirror so I'm guessing it should be 9m.

Ans 26:

Arjun from S.P.M PUBLIC ENGLISH MEDIUM SCHOOL, PUNE
Class : Class 6

Ans 27:

JULFIKAR CHOWDHURY from Apeejay Nerul, mumbai
Class : Class 8

Ans 28:

Agniv Sengupta from PaathShala Amstelveen, Netherlands
Class : Class 6
The answer should be 9m as 12 2=14-5=9

Ans 29:

Sai from DPS international school , Singapore
Class : Class 6
The answer is 9m only, as there are 2 methods: 1. 12 2=14m. 14-5=9m. 2. 12-5=7m. 7 2=9m.

Ans 30:

hari teja from st andrews high school,, secunderabad
Class : Class 6

Ans 31:

Shivani from DPS North school , Bangalore
Class : Class 7
@ Rachita Gupta-I don't know I'm confused now.

Ans 32:

Aditi Kanhucharan Nayak from Heritage international School, Kalyan
Class : Class 7
How 11cm

Ans 33:

muhammad bilal s from indian public school, banglore
Class : Class 6
answer is 9

Ans 34:

Avighna Shastri from doha modern indian school, doha
Class : Class 2
12-5=77*2=14that should be the answer

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HARDIK JANA from BIRLA HIGH SCHOOL MUKUNDAPUR, Kolkata
Subject :NSO    Class : Class 2

Ans 1:

Reyansh Sharma from National public school, hsr layout, bangalore
Class : Class 7
It is so easy

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Apoorv Raut from Podar International School Jalna, Jalna
Subject :NSO    Class : Class 10

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Abhishek kumar from Delhi public school, Gaya
Subject :NSO    Class : Class 8

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Sreyas from Don Bosco, Park Circus, Kolkata
Subject :NSO    Class : Class 4

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Nithya Soman from The Charter School, Eranakulam
Subject :NSO    Class : Class 2

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Sunjeev S from SAN ACADEMY, Chennai
Subject :NSO    Class : Class 6

Ans 1:

Srivatsav from Shikhara, Borampet
Class : Class 4
Option B is the right answer because dahlia using vegetative propagation grows through roots and begonia through leaves and potato through buds

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