International Maths Olympiad Forum By SOF Olympiad Trainer - Page 704

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5
HAPPY NATIONAL DAY OF OMAN

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 8
OPTION D.FIRST WE HAVE TO DIVIDE THE FIRST AND LAST NUMBERS IN ONE COLUMN ,IF WE TAKE THE FIRST COLUMN THE FIRST NUMBER IS 28 AND THIRD NUMBER IS 14. 28 DIVIDED BY 14 IS EQUAL TO 2. THIS 2 IS OBTAINED BY DIVIDING THE MIDDLE NUMBER 10 WITH 5. IN THE SECOND COLUMN THE FIRST NUMBER IS 68 AND THIRD NUMBER IS 17. 17 DIVIDED BY 68 IS EQUAL TO 4. THIS 4 IS OBTAINED BY DIVIDING THE MIDDLE NUMBER 20 WITH 5. SIMILARLY IN THE THIRD COLUMN THE FIRST NUMBER IS 45 AND THE THIRD NUMBER IS 9. 9 DIVIDED BY 45 IS EQUAL TO 5. SO WHEN WE DIVIDE THE MIDDLE NUMBER WITH 5 AND MULTIPLY IT WITH THE THIRD NUMBER WE GET THE FIRST NUMBER. HERE WE HAVE TO FIND THE MIDDLE NUMBER, SO WE HAVE TO MULTIPLY THE ANSWER WE GOT WHEN WE DIVIDED THE FIRST AND THIRD NUMBERS THAT IS 5 WITH 5,THAT IS 25. SO THE MIDDLE NUMBER IS 25 . IF WE WANT TO CHECK THE ANSWER WE CAN DIVIDE THE MIDDLE NUMBER 25 WITH 5 WHICH GIVES US THE ANSWER 5. WHEN WE MULTIPLY 5 WITH THE THIRD NUMBER 9 WE GET THE ANSWER 45 WHICH IS THE FIRST NUMBER. HENCE OUR ANSWER IS PROVED.SO WE CAN SAY THAT OPTION D IS THE ANSWER.

Ans 2:

Class : Class 6

Ans 3:

Class : Class 10

Ans 4:

Class : Class 6
option d is the correct answer .r

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 9
Yeah it sucks

Ans 2:

Class : Class 9
Yeah it sucks

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
a

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Subject :IMO    Class : Class 5

Ans 1:

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

Ans 2:

Class : Class 5
b is the answer

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
d

Ans 2:

Class : Class 5
Answer:17 Option:D

Ans 3:

Class : Class 4
i know the answer

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Subject :IMO    Class : Class 2

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 7
a is correct

Ans 2:

Class : Class 6
i think it is c

Ans 3:

Class : Class 10
the answer should be b

Ans 4:

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 5:

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

Ans 6:

Class : Class 8

Ans 7:

Class : Class 6
muuuuuuuuuuuuuuuuuusko munda

Ans 8:

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 9:

Class : Class 7

Ans 10:

Class : Class 7
b

Ans 11:

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 12:

Class : Class 6
D is the correct answer

Ans 13:

Class : Class 6
Sorry I meant B

Ans 14:

Class : Class 6

Ans 15:

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 16:

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

Ans 17:

Class : Class 7
correct answer is aaaaaaaaaaaaaaaaaaaaaaaaa

Ans 18:

Class : Class 6
b is the correct answer

Ans 19:

Class : Class 10
b is correct

Ans 20:

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 21:

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 22:

Class : Class 10
its b

Ans 23:

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 24:

Class : Class 6
ans is b

Ans 25:

Class : Class 10
the answer is b

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 7
it should be C

Ans 28:

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 29:

Class : Class 10
sorry, a is the correct one

Ans 30:

Class : Class 9
1 is a factor of 6

Ans 31:

Class : Class 9
According to me ,it is C

Ans 32:

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

Ans 33:

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 34:

Class : Class 10
b is correct

Ans 35:

Class : Class 9
THE CORRECT ANSWER IS A

Ans 36:

Class : Class 8
Answer is A

Ans 37:

Class : Class 9

Ans 38:

Class : Class 6
the correct answer is c

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 6

Ans 2:

Class : Class 7
a

Ans 3:

Class : Class 8

Ans 4:

Class : Class 5
The option is A

Ans 5:

Class : Class 6
a

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Subject :IMO    Class : Class 6

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