International Maths Olympiad Forum By SOF Olympiad Trainer - Page 448

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Subject :IMO    Class : Class 10

Ans 1:

Class : Class 10
C

Ans 2: (Master Answer)

Class : Class 1

The correct answer is C.

In ΔAED
AE D + ∠EAD + 90° = 180° (Angle sum property) 
⇒ ∠AED + ∠EAD = 90° 
⇒ ∠EAD = 90° – ∠AED ...(i) 
Also, ∠EAD = (50° + ∠AFB) ...(ii) (Exterior angle property) 
From (i) and (ii), we have 
50° + ∠AFB = 90° – ∠AED 
⇒ ∠AFB + ∠AED = 90° – 50° = 40° 
⇒ ∠AED + ∠CFD = 40°


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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 6
5

Ans 2:

Class : Class 6

Ans 3:

Class : Class 5
D

Ans 4:

Class : Class 6

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 8
ss

Ans 2:

Class : Class 9

Ans 3: (Master Answer)

Class : Class 1

The correct answer is A.

In the 1st column, 2 X 1 + 1 = 3,

In the 2nd column, 12 X 9 + 9 = 117

Similarly, In the 3rd column, 7 X 14 + 7 = 105

Hence, the missing number is 7.


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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 7
No idea

Ans 2:

Class : Class 6
C IS THE ANSWER

Ans 3:

Class : Class 7
No idea

Ans 4:

Class : Class 9
C is the ans

Ans 5:

Class : Class 7
No idea

Ans 6:

Class : Class 7
either a or d

Ans 7:

Class : Class 6

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 4
the answer is a

Ans 2:

Class : Class 7
very easy bro! the answer is a (all sports)

Ans 3:

Class : Class 5
Check the numbers then find the 4 in the ten thousand place

Ans 4:

Class : Class 6
All sports

Ans 5:

Class : Class 4
all sports

Ans 6:

Class : Class 2
ya answer is A

Ans 7:

Class : Class 7
all sports

Ans 8:

Class : Class 6
A

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5
D

Ans 2:

Class : Class 9

Ans 3:

Class : Class 5

Ans 4:

Class : Class 5
It is C

Ans 5:

Class : Class 9

Ans 6:

Class : Class 5
I am bot

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Subject :IMO    Class : Class 2

Ans 1: (Master Answer)

Class : Class 1

The correct answer is A.

Fourth from the left end is  .

Third to the right of  is .


Ans 2:

Class : Class 6
The correct answer is A

Ans 3:

Class : Class 6

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Subject :IMO    Class : Class 5

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 9
I feel all options are wrong

Ans 2:

Class : Class 8
c

Ans 3:

Class : Class 9
2nd option

Ans 4:

Class : Class 8
@abin jose i agree

Ans 5:

Class : Class 9
Raunak Pandey yr answer is wrong , diagonals of a rectangle are not perpendicular

Ans 6:

Class : Class 8

Ans 7:

Class : Class 9
First option is wrong because a parallelogram is not always necessary to be a square or a rectangle ,as they only have diagonals equal. Second option is wrong because rectangle does not follow this property which can be checked by using SAS congruence criteria. Third option is wrong because if the diagonals of a quadrilateral intersect at right angles then it is necessarily a rhombus, if u are thinking that square also have this property then add up a point that every square is a rhombus. Fourth option is wrong because every quadrilateral is not necessarily be a trapezium, a parallelogram or a kite as concave quadrilaterals are none of them.

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 1
There are 6

Ans 2:

Class : Class 8
THERE COULD BE MORE THAN 10

Ans 3:

Class : Class 10
Please mind the arrows. Find ways only that follows the arrows. So Ans will be 5

Ans 4:

Class : Class 5
If I follow the arrows I get 5

Ans 5:

Class : Class 1
There are 6

Ans 6:

Class : Class 4
I know the answer is C but explain the solution

Ans 7:

Class : Class 3
6

Ans 8:

Class : Class 4

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