International Maths Olympiad Forum By SOF Olympiad Trainer - Page 704

User Forum

Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
a

Post Your Answer

Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5
b is the answer

Ans 2:

Class : Class 8
the answer is c not b because 1*140=140,2*70=140,5*28=140,10*14=140

Post Your Answer

Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
d

Ans 2:

Class : Class 4
i know the answer

Ans 3:

Class : Class 5
Answer:17 Option:D

Post Your Answer

Subject :IMO    Class : Class 2

Post Your Answer

Subject :IMO    Class : Class 6

Ans 1:

Class : Class 10
the answer is b

Ans 2:

Class : Class 10
sorry, a is the correct one

Ans 3:

Class : Class 7
it should be C

Ans 4:

Class : Class 10
its b

Ans 5:

Class : Class 9
THE CORRECT ANSWER IS A

Ans 6:

Class : Class 9

Ans 7:

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 8:

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 9:

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 10:

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 11:

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

Ans 12:

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 13:

Class : Class 8
Answer is A

Ans 14:

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 15:

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 16:

Class : Class 7
correct answer is aaaaaaaaaaaaaaaaaaaaaaaaa

Ans 17:

Class : Class 7

Ans 18:

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 19:

Class : Class 6

Ans 20:

Class : Class 8

Ans 21:

Class : Class 10
b is correct

Ans 22:

Class : Class 9
According to me ,it is C

Ans 23:

Class : Class 6
i think it is c

Ans 24:

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 25:

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 26:

Class : Class 6
the correct answer is c

Ans 27:

Class : Class 10
b is correct

Ans 28:

Class : Class 6
D is the correct answer

Ans 29:

Class : Class 7
a is correct

Ans 30:

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

Ans 31:

Class : Class 9
1 is a factor of 6

Ans 32:

Class : Class 10
the answer should be b

Ans 33:

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

Ans 34:

Class : Class 6
Sorry I meant B

Ans 35:

Class : Class 6
b is the correct answer

Ans 36:

Class : Class 6
ans is b

Ans 37:

Class : Class 6
muuuuuuuuuuuuuuuuuusko munda

Ans 38:

Class : Class 7
b

Post Your Answer

Subject :IMO    Class : Class 4

Ans 1:

Class : Class 7
a

Ans 2:

Class : Class 6

Ans 3:

Class : Class 6
a

Ans 4:

Class : Class 8

Ans 5:

Class : Class 5
The option is A

Post Your Answer

Subject :IMO    Class : Class 6

Post Your Answer

Subject :IMO    Class : Class 6

Ans 1:

Class : Class 9

Ans 2:

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

Ans 3:

Class : Class 6
Answer is periods

Post Your Answer

Subject :IMO    Class : Class 7

Ans 1:

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

Ans 2:

Class : Class 7
80,100

Post Your Answer

Subject :IMO    Class : Class 5

Ans 1:

Class : Class 8
answer is 4

Ans 2:

Class : Class 4
there cannot be 8

Ans 3:

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

Ans 4:

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

Ans 5:

Class : Class 5
It should be 4

Ans 6:

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 7:

Class : Class 6

Ans 8:

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

Ans 9:

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 10:

Class : Class 9
So report the error man

Ans 11:

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

Ans 12:

Class : Class 7
It is 8

Ans 13:

Class : Class 6
confusing but obvious

Ans 14:

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

Ans 15:

Class : Class 9
it cannot be 8 at all costs

Ans 16:

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

Ans 17:

Class : Class 6

Ans 18:

Class : Class 8
How ??

Ans 19:

Class : Class 5
B

Ans 20:

Class : Class 7

Ans 21:

Class : Class 5

Ans 22:

Class : Class 5
THE ANSWER IS4

Ans 23:

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

Ans 24:

Class : Class 9
IT IS 8 ONLY

Ans 25:

Class : Class 7
The answer is 4 definitely!

Ans 26:

Class : Class 8
Actually it should be 4 or 12

Ans 27:

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

Ans 28:

Class : Class 8
4

Ans 29:

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.

Ans 30:

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

Ans 31:

Class : Class 5

Ans 32:

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

Ans 33:

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 34:

Class : Class 6
IT IS 12

Ans 35:

Class : Class 7
The answer is 4

Ans 36:

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

Ans 37:

Class : Class 9

Ans 38:

Class : Class 6

Ans 39:

Class : Class 5
D.8

Ans 40:

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 41:

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

Post Your Answer