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
p

Ans 2:

Class : Class 3

Ans 3:

Class : Class 4
m

Ans 4:

Class : Class 4

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Subject :IMO    Class : Class 4

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Subject :IMO    Class : Class 5

Ans 1:

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

Ans 2:

Class : Class 7
4444444444444444444444444444444444444

Ans 3:

Class : Class 7
the correct ans should be option D

Ans 4:

Class : Class 6
in the solution they say 4 and it is 4 but they mark it as wrong

Ans 5:

Class : Class 8
Their ( SOF Olympiad Trainer) solution is saying four , still they have marked 3 .

Ans 6:

Class : Class 7
my answer is 4 but you marked it wrong

Ans 7:

Class : Class 7

Ans 8:

Class : Class 6
ddddddddddddddddddddddddd4444444444444444444444444444444444444444444444444444ddddddddddddddddd

Ans 9:

Class : Class 6

Ans 10:

Class : Class 7
my answer is 4 but it is marked as 3

Ans 11:

Class : Class 6
it is a printing mistake

Ans 12:

Class : Class 6

Ans 13:

Class : Class 8
the answer is 4{d}

Ans 14:

Class : Class 7
the answer is 4{d}

Ans 15:

Class : Class 7
why they are giving the answer as 4

Ans 16:

Class : Class 6
my answer i 4 but they marked it wrong and showed the correct answer 3 but in the solution they are saying the answer is 4.

Ans 17:

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 18:

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

Ans 19:

Class : Class 6
Srijit, you are absolutely right!

Ans 20:

Class : Class 5
Why is the solution answer D but, answer C? Answer 4 is answer D!!!

Ans 21:

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

Ans 22:

Class : Class 6
your answer is wrong

Ans 23:

Class : Class 6
I think that it's a printing mistake. IN solution they are writing C,H,A,I have a line of symmetry which are 4 letters, but in the answer they are giving 3

Ans 24:

Class : Class 7
my answer is 4 but you marked it wrong

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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

Ans 2:

Class : Class 9

Ans 3:

Class : Class 9
option c

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Subject :IMO    Class : Class 7

Which of the following statements is CORRECT?
Statement-1 :Mathematics textbook for Class VII has 320 pages. The chapter ‘Symmetry’ runs from page 261 to page 272. The ratio of the number of pages of this chapter to the total number of pages of the book is 3 : 81
Statement-2 :In a school of 100 students, only 2 out of 5 students can participate in a quiz. The percentage of students that participate in the quiz is 40%.

A Only Statement-1
B Only Statement-2
C Both Statement-1 and Statement-2
D Neither Statement-1 nor Statement-2


Ans 1:

Class : Class 8
12:320=3:80 in its simplest form. It is not equal to 3:81. You may simplify it like 12/320 divide both numerator and denominator by 4. You will surely get the answer as 3:80.

Ans 2:

Class : Class 8
I have confusion in statement 1 but 2nd statement are correct. 1st statement in first no of pages in symmetry chapter is 12. total no pages is 320. the ratio is 12:320 =3:81 = 1 :27 2nd statement 2 out of 5 can participate means 40% of the student the 40% of 100 is 40 the percentage of students that participate in the quiz = 40/100*100 40%

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Subject :IMO    Class : Class 7

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 4

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5
According to DMAS it should be D.

Ans 2:

Class : Class 6
yes, we also got the same answer. SOF should explain what rukle they followed

Ans 3:

Class : Class 6
As per DMAS rules, the Answer is D

Ans 4:

Class : Class 5
No according to Bodmas rule the answer given by SOF is CORRECT

Ans 5:

Class : Class 5
But i checked with a calculator which gave the answer as a which is 69.48

Ans 6:

Class : Class 6
The answer should be D not A. In the first line they have used BODMAS, but in the second they have not and if we use BODMAS we will get option d.

Ans 7:

Class : Class 5
Yes It should be D according to bodmas rule

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