International Maths Olympiad Forum By SOF Olympiad Trainer - Page 290

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Subject :IMO    Class : Class 8

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Subject :IMO    Class : Class 3

Ans 1: (Master Answer)

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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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 10
how

Ans 2:

Class : Class 8
How

Ans 3:

Class : Class 8
Exactly. How?!

Ans 4:

Class : Class 9
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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Subject :IMO    Class : Class 8

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 6

Ans 2:

Class : Class 6
the answer is obviously D.

Ans 3:

Class : Class 7
how is it admin

Ans 4:

Class : Class 6
the answer is obviously D.

Ans 5:

Class : Class 7

Ans 6:

Class : Class 5

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 8
the answer is wrong . the answer is c

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Subject :IMO    Class : Class 6

Ans 1:

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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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5
so easy

Ans 2:

Class : Class 5

Ans 3:

Class : Class 5

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5

Ans 2:

Class : Class 6
It is A

Ans 3:

Class : Class 5

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