International Maths Olympiad Forum By SOF Olympiad Trainer

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Subject :IMO    Class : Class 8

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
C

Ans 2:

Class : Class 5
A

Ans 3:

Class : Class 5
A

Ans 4:

Class : Class 5
A

Ans 5:

Class : Class 3
C

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 9

Ans 2:

Class : Class 9
A

Ans 3:

Class : Class 9
think that you are buying toffees if you buy 2 toffees of $2 each then your total cost would be 2*$2 =$4 similarly here, (x+4)*(x+4) =x^2 + 8x + 16 hence option a

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Subject :IMO    Class : Class 8

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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 4

Ans 1:

Class : Class 4

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 4
my answer is 4 but you marked it wrong

Ans 2:

Class : Class 6

Ans 3:

Class : Class 6
The answer should be D. 4 as C, H, A, and I have at least a line of symmetry

Ans 4:

Class : Class 6
my answer is 4 but you marked it wrong

Ans 5:

Class : Class 6

Ans 6:

Class : Class 5
my answer is 4 but you marked it wrong

Ans 7:

Class : Class 3

Ans 8:

Class : Class 6
the answer should be D,4 and not C,3 as the letters in CHAIR are C,H,A,I but not R have a line of symmetry.

Ans 9:

Class : Class 6
my answer is 4 but it is marked as 3

Ans 10:

Class : Class 6
Their ( SOF Olympiad Trainer) solution is saying four , still they have marked 3 .

Ans 11:

Class : Class 6
my answer is 4 but you marked it wrong

Ans 12:

Class : Class 5
Srijit, you are absolutely right!

Ans 13:

Class : Class 3
the answer is 4{d}

Ans 14:

Class : Class 4
your answer is wrong

Ans 15:

Class : Class 6
the answer is 4{d}

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 8
the answer is(b) 65

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Subject :IMO    Class : Class 9

The following table gives the ages of teachers in XYZ school.₹

A teacher is selected at random from the group, then which of the following statements is INCORRECT?

A Probability of a teacher having age greater than or equal to 35, is
B Probability of ateacher having age more than or equal to 25 and less than 40, is
C Probability of a teacher selected is of age not less than 30, is
D Probability of a teacher selected from the youngest group, is


In the age group 35-40, it should be 300 instead of 320 .Only then is the answer coming ..according to the solution it is 300.

Ans 1:

Class : Class 9

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