International Maths Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :IMO    Class : Class 6

Read the following statements.
Statement-1 :A number for which sum of all its factors is equal to twice the number is called perfect number.
Statement-2 :If two numbers are divisible by a number, then their sum and difference are also divisible by that number.
Which of the following options holds?

A Both Statement-1 and Statement-2 are true.
B Statement-1 is true but Statement-2 is false.
C Statement-1 is false but Statement-2 is true.
D Both Statement-1 and Statement-2 are false.


add solution to this question

Ans 1:

Class : Class 6
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 2:

Class : Class 7
b

Ans 3:

Class : Class 9
THE CORRECT ANSWER IS A

Ans 4:

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 5:

Class : Class 6
D is the correct answer

Ans 6:

Class : Class 8
the answer is b

Ans 7:

Class : Class 9
According to me ,it is C

Ans 8:

Class : Class 6
the correct answer is c

Ans 9:

Class : Class 7

Ans 10:

Class : Class 8
Answer is A

Ans 11:

Class : Class 6
muuuuuuuuuuuuuuuuuusko munda

Ans 12:

Class : Class 6
b is the correct answer

Ans 13:

Class : Class 7
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 14:

Class : Class 6
it should be C

Ans 15:

Class : Class 7
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 16:

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 17:

Class : Class 6

Ans 18:

Class : Class 7

Ans 19:

Class : Class 6
the answer should be b

Ans 20:

Class : Class 6
sorry, a is the correct one

Ans 21:

Class : Class 10
its b

Ans 22:

Class : Class 10
b is correct

Ans 23:

Class : Class 10
b is correct

Ans 24:

Class : Class 6
ans is b

Ans 25:

Class : Class 7
a is correct

Ans 26:

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 27:

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

Ans 28:

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

Post Your Answer

Subject :IMO    Class : Class 4

Ans 1:

Class : Class 6
a

Ans 2:

Class : Class 5

Ans 3:

Class : Class 5
The option is A

Post Your Answer

Subject :IMO    Class : Class 6

Ans 1:

Class : Class 5
5 million

Post Your Answer

Subject :IMO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

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 5
THE ANSWER IS4

Ans 2:

Class : Class 5

Ans 3:

Class : Class 6

Ans 4:

Class : Class 6
It is 8

Ans 5:

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

Ans 6:

Class : Class 6
It should be 4

Ans 7:

Class : Class 5
It is Eight . If you tilt the small angles you will notice that there are eight right angles

Ans 8:

Class : Class 6
it cannot be 8 at all costs

Ans 9:

Class : Class 5
B

Ans 10:

Class : Class 6
The correct answer is 4. It cannot be 8 at all costs. There is a error!!!!!!!!!!

Ans 11:

Class : Class 5
Actually it should be 4 or 12

Ans 12:

Class : Class 6
The answer is 4

Ans 13:

Class : Class 7
The answer is 4 definitely!

Ans 14:

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 15:

Class : Class 5
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 16:

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

Ans 17:

Class : Class 8
IT IS 8 ONLY

Ans 18:

Class : Class 5

Ans 19:

Class : Class 5
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 20:

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 21:

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

Ans 22:

Class : Class 6
So report the error man

Ans 23:

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

Ans 24:

Class : Class 6

Ans 25:

Class : Class 5
D.8

Ans 26:

Class : Class 8
4

Ans 27:

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

Ans 28:

Class : Class 5
answer is 4

Ans 29:

Class : Class 6

Ans 30:

Class : Class 4
there cannot be 8

Ans 31:

Class : Class 7

Ans 32:

Class : Class 6
It cannot be 8 at all costs There is an error in this question

Ans 33:

Class : Class 7
How ??

Ans 34:

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

Ans 35:

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

Post Your Answer

Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5
Obtuse

Post Your Answer

Subject :IMO    Class : Class 4

Post Your Answer

Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5
Obtuse

Post Your Answer

Subject :IMO    Class : Class 6

Post Your Answer