International Maths Olympiad Forum By SOF Olympiad Trainer - Page 684
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AARNA Kapse from The swaminarayan school, Nagpur
Subject :IMO    Class : Class 1

Ans 1: (Master Answer)

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

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Aarti golyan from Indian school sohar, sohar
Subject :IMO    Class : Class 7

Ans 1:

Saksham Khurana from Bhatnagar International School, New Delhi
Class : Class 8
B 118.80

Ans 2:

Anhiti Mandal from Shri Ram School, Gurgaon
Class : Class 9
i mean is it an error by sof

Ans 3:

Anhiti Mandal from Shri Ram School, Gurgaon
Class : Class 9
how??

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Shreyas Singh from Podar International School, Pune
Subject :IMO    Class : Class 4

Ans 1:

Ishita Vinod from fahaheel al watanieh indian private school ahmadi,kuwait, kuwait
Class : Class 8
option c)392 is the right answer

Ans 2:

Shruti Agarwal from dpsnoida, Noida
Class : Class 8
yeah

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ARIJIT SINGH from SAT PAUL MITTAL SCHOOL , Ludhiana
Subject :IMO    Class : Class 4

Ans 1:

Arihant kumar from Delhi public school,EOK, New Delhi
Class : Class 8
Answer is [c]

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Veda Walavalkar from Vibgyor, Goregaon(west)
Subject :IMO    Class : Class 1

Ans 1: (Master Answer)

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

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Veda Walavalkar from Vibgyor, Goregaon(west)
Subject :IMO    Class : Class 1

Ans 1: (Master Answer)

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

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Veda Walavalkar from Vibgyor, Goregaon(west)
Subject :IMO    Class : Class 1

Ans 1: (Master Answer)

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

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Ruchi Khanna from strawberry fields high school , Chandigarh
Subject :IMO    Class : Class 5

Ans 1:

Antareep from IVWS, Kolkata
Class : Class 6
A

Ans 2:

Maedhavi Bhargava from Maharaja Sawai Mansingh Vidyalaya, Jaipur
Class : Class 5
56/3÷8/3 56/3*3/8 56/8 =7

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Arjun Adate from Pawar Public School , Pune
Subject :IMO    Class : Class 3

Ans 1:

arjun from NISV, Vadodara
Class : Class 3
lol

Ans 2:

JIYA GOSWAMI from DPS, Ranchi
Class : Class 6
Using Factorial for Class 3 seems difficult. I taught my daughter as under:- Step 1 - Put 7 at thousand place and how many different numbers we can get --She replied 6 Step 2- Put 5 at thousand place and how many different numbers we can get --She replied 6 Step 3 -Put 0 at thousand place , do we get four digit number --She replied NO Ste 4 - Put 2 at thousand place and how many different numbers we can get --She replied 6 Step 5 - Add numbers obtained in above steps we get 18

Ans 3:

Soumyajit Das from Hariyana Vidya Mandir, NORTH 24 PARGANAS
Class : Class 8
option d

Ans 4:

Rudra Veer Singh from Delhi Public School Noida, Noida
Class : Class 4
TOUGH FOR CLASS 1

Ans 5:

Shaurya Tandon from Amity International, Noida
Class : Class 3
lol class 1 ha ha ha..

Ans 6:

Varesh Hemwani from R.D Public School Betul, betul
Class : Class 3
(D) 18

Ans 7:

Vibhuraman from NPS, Bangalore
Class : Class 3
n!-(n-1)! is the answer. n is number of digits here. (n-1)! is subtracted from n! since there is digit with 0. otherwise it is just n! Now How do you calculate n!. For example 4! here. 4! = 4x3x2x1 = 24 (4-1)! = 3! = 3x2x1 = 6 Hence the answer is n! - (n-1)! = 4! - (4-1)! = 4! - 3! = 24 -6 = 18 Option D is the answer.

Ans 8:

Shaurya Tandon from Amity International, Noida
Class : Class 3

Ans 9:

Ishika Kumar from Greenwood High, Bangalore
Class : Class 5

Ans 10:

Ishika Kumar from Greenwood High, Bangalore
Class : Class 5

Ans 11:

Suyash Maurya from Chandresh Lodha Memorial School, Dombivali
Class : Class 3

Ans 12:

Tanishka from Gopalan International School, Bangalore
Class : Class 1
its so easy right

Ans 13:

Kashika Goel from DPS Noida, Noida
Class : Class 7

Ans 14:

ARYAN P from DPS E-CITY Bangalore, Bangalore
Class : Class 5

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AKSHITA.KRISHNAN from DPS Noida, Noida
Subject :IMO    Class : Class 3

Ans 1:

Rajveer from DPS, Bengaluru
Class : Class 3
c

Ans 2:

Varesh Hemwani from R.D Public School Betul, betul
Class : Class 3
(C) 7 tables

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