International Maths Olympiad Forum By SOF Olympiad Trainer - Page 799
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Arihant Jain from Indo American Public School, Udaipur
Subject :IMO    Class : Class 8

Ans 1:

shaurya from Kendriya vidyalaya, kawardha
Class : Class 8

Ans 2:

PRAFUL from KENDRIYA VIDYALAYA MYSORE , MYSURU
Class : Class 8

Ans 3:

Ananya Singh Baghel from DPS, NASIK , India
Class : Class 8
this was an easy one

Ans 4:

Bhavika Rakesh from VIBGYOR HIGH BALEWADI, Pune
Class : Class 9

Ans 5:

Senthil from Einstien Public School, Coimbatore
Class : Class 9
First add the numbers in opposite and square it. Do the same for all the three pairs, Finally add the three results. You will get the number at the centre Example: 1st one 1+6= 7 7^2 = 49 9 + 4 = 13 13 ^ 2 = 169 3+ 5 = 8 8^ 2 = 64 49+169+64 = 282 All the best...............

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Arihant Jain from Indo American Public School, Udaipur
Subject :IMO    Class : Class 8

Ans 1: (Master Answer)

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

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anam aziz from st. francis senior secendory school, Bilaspur
Subject :IMO    Class : Class 6

Ans 1:

Sushil Kumar from dpsnoida, Noida
Class : Class 7
128

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Adiammu from RGS, USA
Subject :IMO    Class : Class 7

Ans 1: (Master Answer)

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

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patelkushal7 from new era senior secondary school, Vadodara
Subject :IMO    Class : Class 7

Ans 1:

Kundan from Vasistha genesis school, Bardoli
Class : Class 7
OPTION:-A) 20 because its simple decrease 2cm from 5cm ans is 3cm therefore, the insect crawls 3cm per second then 60 divided by 3 = 20,therefore ans =20 seconds

Ans 2:

Kundan from Vasistha genesis school, Bardoli
Class : Class 7
OPTION:-A) 20 because its simple decrease 2cm from 5cm ans is 3cm therefore, the insect crawls 3cm per second then 60 divided by 3 = 20,therefore ans =20 seconds

Ans 3:

Admin from SOF, Noida
Class : Class 10
Answer : B

Solution
Insect moved (5 - 2) cm per 2 seconds = 3 cm per 2 seconds
It will move 60 cm in (2/3 x 60) = 40 seconds

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BASWANT NARWADE from TINY ANGELS SCHOOL, Nanded
Subject :IMO    Class : Class 6

Ans 1:

Saihaan from WPIS, Ambur
Class : Class 7
There are six- 97,101,103,107,109,113

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Adiammu from RGS, USA
Subject :IMO    Class : Class 7

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Sushil Kumar from dpsnoida, Noida
Subject :IMO    Class : Class 6

Ans 1: (Master Answer)

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

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Jhumur Bhattacharya Kanungo from shivprakash memorial school, dadra & nagar haveli, silvassa
Subject :IMO    Class : Class 4

Ans 1:

ayush pro legend from dps haridwar, haridwar
Class : Class 5

Ans 2:

Vrushti from swami vivekanand english primary school, Mumbai
Class : Class 4
left side weight is 12 + 6(small ball) = 6 + 6 + 6 ( which means 12 + 6 + 6 + 6 + 6 = 36)

Ans 3:

sklogic from SSM School, Chennai
Class : Class 3
I think they are asking for the mass of all 5 balls together. The mass of small ball is 6 Kg. Hence the total mass = 12 + 6 + 6 + 6 + 6 = 36.

Ans 4:

Admin from SOF, Noida
Class : Class 10
Answer: C (36 kg)
The option C should be 36 kg and not 30 kg. Corrected the mistake.

Solution:
Let the weight of the small ball be x.
3x = 12 + x
2x = 12
x = 6
Weight of 5 balls = 12 + 6+ 6+ 6 +6 = 36kg

Ans 5:

Admin from SOF, Noida
Class : Class 10
Answer: C (36 kg)
The option C should be 36 kg and not 30 kg. Corrected the mistake.

Solution:
Let the weight of the small ball be x.
3x = 12 + x
2x = 12
x = 6
Weight of 5 balls = 12 + 6+ 6+ 6 +6 = 36kg

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Meowness from Why should I tell?, Wow
Subject :IMO    Class : Class 5

Ans 1:

Priyal Gulati from ,
Class : Class 7
I don't think this answer is correct.

Ans 2:

Priyal Gulati from ,
Class : Class 7
The should be a division sign.

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