International Maths Olympiad Forum By SOF Olympiad Trainer - Page 706

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 8
according to me , its B as if two numbers are divisible by a number , their sum and difference is not divisible by the same number . For example : 2

Ans 3:

Class : Class 7
correct answer is aaaaaaaaaaaaaaaaaaaaaaaaa

Ans 4:

Class : Class 10
b is correct

Ans 5:

Class : Class 6
it should be A because if we take 39 and 26 as multiples and 13 as factor then 39-26=13. which is divisible by 13

Ans 6:

Class : Class 10
its b

Ans 7:

Class : Class 7
it should be C

Ans 8:

Class : Class 8
Answer is A

Ans 9:

Class : Class 6
ans is b

Ans 10:

Class : Class 10
sorry, a is the correct one

Ans 11:

Class : Class 6

Ans 12:

Class : Class 7
b

Ans 13:

Class : Class 7
a is correct

Ans 14:

Class : Class 10
b is correct

Ans 15:

Class : Class 6
THE ANSWER SHOULD BE NONE OTHER THAN C. NOT A , NOT B OR NOR D. NOOOOOO ABD

Ans 16:

Class : Class 8
statement 1- The definition of perfect number on google is the same as the definition of perfect number provided by the question as for statement 2 eg 6 and 4 is divisible by 2 so 6 4= 10 div by 2 and 6-4= 2 also div by 2. so people who say answer is b c or d are complete idiots

Ans 17:

Class : Class 7
According to me, A is the correct answer.

Ans 18:

Class : Class 6
The answer is A!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Kindly adhere!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 19:

Class : Class 6
some are saying a, some are saying b, some are saying c and some are saying d. what is the correct answer??????

Ans 20:

Class : Class 9

Ans 21:

Class : Class 8
a because lets take 6, its factors are 1,2,3,6. When we add these numbers we get 12 which is twice 6

Ans 22:

Class : Class 8
The answer can only be C. For the first statement, If you take an example as 6, it will be 1 2 3=6 which means statement 1 is false as it is written that it should be double. Statement 2 is true. For example, take 25 and 20 and the number as 5. 25 20=45(Divisible by 5) and 25-20=5(Divisible by 5)

Ans 23:

Class : Class 10
the answer should be b

Ans 24:

Class : Class 6
its b because say if you take 6,and you say 2 and 3 are divisible by it. then they are saying that their sum and diff is also divisible but 2 3 is 5 which is not divisible by 6

Ans 25:

Class : Class 6
D is the correct answer

Ans 26:

Class : Class 6
the correct answer is c

Ans 27:

Class : Class 9
THE CORRECT ANSWER IS A

Ans 28:

Class : Class 8

Ans 29:

Class : Class 7
The ans is a becauseStatement 1: if we take the number 6 its factors except 6 are 1,2,3 there sum is 6 so it is a perfect numberStatement 2: If we take 9 and 27 they are divisible by 3 so their sum which is 36 is also divisible by 3 and there diffrence is 18 which is divisible by 3.

Ans 30:

Class : Class 6
b is the correct answer

Ans 31:

Class : Class 7
statement 1- The definition of perfect number on google is the same as the definition of perfect number provided by the question as for statement 2 eg 6 and 4 is divisible by 2 so 6 4= 10 div by 2 and 6-4= 2 also div by 2. so people who say answer is b c or d are complete idiots

Ans 32:

Class : Class 8
I am confused what is the answer because some are saying a , some are saying b ,some are saying c and some are saying d .

Ans 33:

Class : Class 6
Sorry I meant B

Ans 34:

Class : Class 6
muuuuuuuuuuuuuuuuuusko munda

Ans 35:

Class : Class 9
According to me ,it is C

Ans 36:

Class : Class 6
i think it is c

Ans 37:

Class : Class 9
1 is a factor of 6

Ans 38:

Class : Class 10
the answer is b

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 7
a

Ans 2:

Class : Class 5
The option is A

Ans 3:

Class : Class 6

Ans 4:

Class : Class 6
a

Ans 5:

Class : Class 8

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Subject :IMO    Class : Class 6

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 9

Ans 2:

Class : Class 6
Answer is periods

Ans 3:

Class : Class 6
What is the meaning of this question? I thought a period means a full stop?

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 7
80,100

Ans 2:

Class : Class 10
the angles are 80 degree and 100 degree. Method- 4:5=4x and 5x , 4x+5x=180 , 9x=180, x=180/9, x=20, therefore, 4:5= 4*20and 5*20 4:5=80 and 100

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 6
The answer is D(8) because if we look at the V from a Tilted angle then it is a 90 degree angle. 4 V4 right angles4 4= 8

Ans 2:

Class : Class 5
4/8 votei vote 4 they have done wrong with no solution

Ans 3:

Class : Class 6
Everybody look carefully ! We use to be clever know we are not.

Ans 4:

Class : Class 6
answer is 4. how can it be 8

Ans 5:

Class : Class 5
Look carefully, even I got to know the answer after reading the comments

Ans 6:

Class : Class 5
B

Ans 7:

Class : Class 9
it cannot be 8 at all costs

Ans 8:

Class : Class 9
So report the error man

Ans 9:

Class : Class 5
It should be 4

Ans 10:

Class : Class 8
The correct answer is 4. It cannot be 8 at all costs. There is a error!!!!!!!!!!

Ans 11:

Class : Class 8
How ??

Ans 12:

Class : Class 7
It is Eight . If you tilt the small angles you will notice that there are eight right angles

Ans 13:

Class : Class 8
4

Ans 14:

Class : Class 7
The answer is obviously 4.There cannot be 8 at all costs

Ans 15:

Class : Class 5

Ans 16:

Class : Class 5

Ans 17:

Class : Class 8
Actually it should be 4 or 12

Ans 18:

Class : Class 6

Ans 19:

Class : Class 4
Look closely. The answer is 8. If you look at the cuts in the ribbon which looks like a V at the top, you can see the right angle by tilting your device. Same follows with the other cuts

Ans 20:

Class : Class 9

Ans 21:

Class : Class 7
The answer is 4 definitely!

Ans 22:

Class : Class 7
Thank you very much friends if you all co-operate me, Nilarka and Khushie!

Ans 23:

Class : Class 7
It is 8

Ans 24:

Class : Class 6

Ans 25:

Class : Class 6
confusing but obvious

Ans 26:

Class : Class 9
It cannot be 8 at all costs There is an error in this question

Ans 27:

Class : Class 9
IT IS 8 ONLY

Ans 28:

Class : Class 4
No ,the answer is 8 because those small angles are also right angle

Ans 29:

Class : Class 5
THE ANSWER IS4

Ans 30:

Class : Class 6

Ans 31:

Class : Class 6
THE ANSWER IS 12 AS IF YOU LOKE AT ACUTE ANGLES IN THE EXTERIOR YOU CAN SEE 2 RIGHT ANGLES

Ans 32:

Class : Class 4
there cannot be 8

Ans 33:

Class : Class 8
answer is 4

Ans 34:

Class : Class 6
IT IS 12

Ans 35:

Class : Class 7
Very good Nilarka Pahari and Khushie. Friends , the correct answer is B only. Just try to see . Tilt your head to your right and try to see the cuts at the end of the ribbons . You will find the error of your own. Did you find that? I know that only 5 to 37 percent of you can nfind the eight angles. Be very accurate and intelligent. I also did the same mistake while giving the test . Please look carefully!

Ans 36:

Class : Class 7
The answer is 4

Ans 37:

Class : Class 6
I think soumyaraj Roy is correct as there are no other angles that are exactly 90 degrees.

Ans 38:

Class : Class 6
No, it is 8. You can see 4 of them easily. The other four are hidden between the sharp edges of the figure. Tilt it 2 find out.

Ans 39:

Class : Class 5
D.8

Ans 40:

Class : Class 7

Ans 41:

Class : Class 6
On the outside, we see 4 right angles easily. But if you turn your device 90 degrees left/right, you will see that the angle formed by the sharp edges of the figure also measures 90 degrees. It is just not visible due to the angle you look at it.

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Subject :IMO    Class : Class 5

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Subject :IMO    Class : Class 4

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Subject :IMO    Class : Class 5

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Subject :IMO    Class : Class 6

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