International Maths Olympiad Forum By SOF Olympiad Trainer

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Subject :IMO    Class : Class 5

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Subject :IMO    Class : Class 6

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Subject :IMO    Class : Class 6

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 8
correct ans. should be C

Ans 2:

Class : Class 9
answer is bwhen we move from left to rightexample-1000 to 100how do you get 100 by dividing it by 10 right?i.e 1000/10 = 100answer = 1/10

Ans 3:

Class : Class 6
answer should be c not b

Ans 4:

Class : Class 8
and should be c

Ans 5:

Class : Class 7
ans should be c

Ans 6:

Class : Class 5
answer should be c

Ans 7:

Class : Class 6
The answer is c. It decreases by 1 by 10 when it goes from right to left, not from left to right.

Ans 8:

Class : Class 6
how can it decrease by 1/10. it changes by 1/10 and decreases by 10 times answer should be C

Ans 9:

Class : Class 6
the answer should be option C

Ans 10:

Class : Class 6
answer should be C because it already says the word divide and if we write ans as B then it will become ( eg. 100/1/10 = 1000) hence it should be ( eg. 100/10 = 10) . PLS CORRECT IT SOF !!!!!

Ans 11:

Class : Class 6
The correct answer is C as 100/10 is 10, 1000/100 is also 10.

Ans 12:

Class : Class 8
I think answer is B.....as we have to divide the digit by number 10 each time we move from left to right .....and so its value decreases eg 500 is divided by 10 (500*1/10 = 50) to make its place value from hundred to tens

Ans 13:

Class : Class 9
The answer is (c)

Ans 14:

Class : Class 7

Ans 15:

Class : Class 8
ans. should be [C].

Ans 16:

Class : Class 7
ans should be C

Ans 17:

Class : Class 6
The and should be C

Ans 18:

Class : Class 7

Ans 19:

Class : Class 8
Its C

Ans 20:

Class : Class 6
the correct answer is [B] because if we take a no. as 10.ok.then i am doing like example see- 10X1/10 so it is =1 so it decreased

Ans 21:

Class : Class 8

Ans 22:

Class : Class 7
the answer is C.. B is the wrong answer . if we have to move the digits from left to right we should multiply and not divide.. please clarify SOF..

Ans 23:

Class : Class 6

Ans 24:

Class : Class 7
answer should be Cas 100 /10 is 10

Ans 25:

Class : Class 6
Ans should be (c)

Ans 26:

Class : Class 6
c

Ans 27:

Class : Class 8
c is right because we have to multiply cause we are given times.. 1000x___= 100... so we get 1000/10= 10 so c is right

Ans 28:

Class : Class 5
correct ans. should be C

Ans 29:

Class : Class 5
decreasing by 1/10 is not possible . the answer should be (c)

Ans 30:

Class : Class 9

Ans 31:

Class : Class 6
Ans is (c).

Ans 32:

Class : Class 7
As he is saying times, it should be 10 and not 1/10. So, answer should be C

Ans 33:

Class : Class 8
it should be B as it is decreased by not increased if it was increased than it was 10

Ans 34:

Class : Class 5
THE ANSWER SHOULD BE (B) PLEASE VERIFY SOF!!!!

Ans 35:

Class : Class 6
Ans c only makes sense

Ans 36:

Class : Class 7
Answer should be C

Ans 37:

Class : Class 8
The correct answer is (C) because the question asks you by how many times it is DECREASING from LEFT TO RIGHT . If it said increasing, then the answer would be (B)

Ans 38:

Class : Class 7

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 6
thank you

Ans 2:

Class : Class 4
b

Ans 3:

Class : Class 4
b

Ans 4:

Class : Class 7
hey , it is 90 tenths cause tenths means at the tenths place only . But if if there is another no. like 90 tenths we should multiply . But if you choose hundredth tenths it it will become in thousands value.

Ans 5:

Class : Class 3
Ya B

Ans 6:

Class : Class 8
The answer is B but if anyone has doubt , please call 9243729047 . I will explain it briefly to you .

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Subject :IMO    Class : Class 5

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 6
If the movie is for 2 hours it can be shown 6 times between 12 noon and 12 midnight which is 12 hours. 12/2=6. The answer is B.

Ans 2:

Class : Class 4
Ok

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Subject :IMO    Class : Class 7

Which of the following options hold?
I. Two triangles are congruent to each other if their corresponding angles and corresponding sides are euqal.
II. If two angles and the included side of one triangle are equal to two corresponding angles and the included side of another triangle, then the two triangles are congruent to each other.
III. If three angles of a triangle are equal to three corresponding angles of another triangle, then the triangles are called congruent.

AI and II are true, III is false
BI and III are true, II is false
Conly I is true
DAll of these are true.


all are conditions of congruence by definition

Ans 1:

Class : Class 8
III is false because AAA is no property

Ans 2:

Class : Class 8
Why III is false?

Ans 3: (Master Answer)

Class : Class 1
The correct answer is A.

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 7
I agree with Ahmad

Ans 2:

Class : Class 7
I agree with Ahmad

Ans 3:

Class : Class 8
I agree . There are 6 letters with a rotational line of symmetry

Ans 4:

Class : Class 7
please explain the answer in details

Ans 5:

Class : Class 7
It is five letters since H,O,S,X and Z

Ans 6:

Class : Class 8
Please Someone explain

Ans 7:

Class : Class 8

Ans 8:

Class : Class 7
Yes there are 6 letters I also agree with Ahmad

Ans 9:

Class : Class 7
There is a mistake.Actually there are 6 lettersThose are-H, O, S, X, Z, N

Ans 10:

Class : Class 7
h,o,x,s,n i think it is the answer

Ans 11:

Class : Class 5
I agree with Ahmad.

Ans 12:

Class : Class 8
I also agree with Ahmad

Ans 13:

Class : Class 7
IT IS 6 RIGHT?

Ans 14:

Class : Class 7
It is 7 becoz B has rotational symmetry of order2.

Ans 15:

Class : Class 8
I agree with Ahmad

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