International Maths Olympiad Forum By SOF Olympiad Trainer - Page 354
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Samriddhi Debnath from Garden High School, Kolkata
Subject :IMO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

(D): 98 - 35 + 17 = 80


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Aarav Srivastav from DWPS , Noida Extension
Subject :IMO    Class : Class 6

Ans 1:

Aarav Srivastav from DWPS , Noida Extension
Class : Class 7

Ans 2:

Aarav Srivastav from DWPS , Noida Extension
Class : Class 7

Ans 3:

Jeronee from Christwood School, PERUMBAKKAM
Class : Class 5
Ans is A

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Ruchi Sinha from DPS Gurgaon , Gurgaon
Subject :IMO    Class : Class 8

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Samriddhi Debnath from Garden High School, Kolkata
Subject :IMO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

(B):  4029 + 588 = 4617 ( place value of 6 here is 600 )

Number multiplied by 0 always gives 0. 
Thus , both statements 1 and 2 are false.


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Ramya from brindavan vidyalaya, Trichy
Subject :IMO    Class : Class 8

Ans 1:

Riddhiraj Saha from St. Xeviers Institution , Panihati, Kolkata
Class : Class 8
How

Ans 2:

rajib jana from DPS MEGA City, Kolkata
Class : Class 8
Exactly. How?!

Ans 3:

Tagore Tathagath Gedela from Dimensions international College, Singapore
Class : Class 10
how

Ans 4:

Joe Bipin from National Public School Agra, Bangalore
Class : Class 10
i understood it now, it is that only non zero rational numbers are closed in division, that is why it is false cause they said all and not nonzero

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Ramya from brindavan vidyalaya, Trichy
Subject :IMO    Class : Class 8

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Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Subject :IMO    Class : Class 3

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Avani from NPS International singapore, singapore
Subject :IMO    Class : Class 5

Ans 1:

Avani from NPS International singapore, singapore
Class : Class 6

Ans 2:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6
the answer is obviously D.

Ans 3:

Mihishkaa from PSBBLLA, Bangalore
Class : Class 7
how is it admin

Ans 4:

Mihishkaa from PSBBLLA, Bangalore
Class : Class 7

Ans 5:

Vivaan Singh from Salwan Junior School, NEW DELHI
Class : Class 5

Ans 6:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6
the answer is obviously D.

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Aadvik saini from Mvn sector 17, Faridabad
Subject :IMO    Class : Class 5

Ans 1:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
the answer is wrong . the answer is c

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Pratheek from Null, Null
Subject :IMO    Class : Class 6

Ans 1:

KUMARI ARYA from sarvottam international school, greater noida
Class : Class 4
THE ANSWER IS (B) AS GIVEN IN THE QUESTION IS 61*82 IS DIVISIBLE BY 11 AS WE KNOW THAT WHEN THE DIFFERENCE BETWEEN THE SUM OF DIGITS IN EVEN AND ODD PLACES IS 0 OR A MULTIPLE OF 11 SO THE MINIMUM VALUE OF * SHOULD BE 1 AS 6 + 1 + 2 = 9 AND 1 + 8 = 9 AND 9 - 9 = 0 HENCE ,IT IS DIVISIBLE BY 11

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