International Maths Olympiad Forum By SOF Olympiad Trainer - Page 688

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
c

Ans 2:

Class : Class 9
c is the answer

Ans 3:

Class : Class 3

Ans 4:

Class : Class 7
MY ANSWER IS [C] ..

Ans 5:

Class : Class 7
this is right now i have understood

Ans 6:

Class : Class 7
how c, has been come

Ans 7:

Class : Class 3
the answer is c

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Subject :IMO    Class : Class 2

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

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Subject :IMO    Class : Class 1

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 10

Ans 2:

Class : Class 8
how is the answer C ?

Ans 3:

Class : Class 8
Very complicated answer shown

Ans 4:

Class : Class 7
I dont see how option C is the correct option

Ans 5:

Class : Class 8
I think the answer should be B

Ans 6:

Class : Class 9
answer is option c

Ans 7:

Class : Class 10

Ans 8:

Class : Class 9
please xplain this question

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
it is 18 and 8

Ans 2:

Class : Class 6
SHOULD BE 18?

Ans 3:

Class : Class 3
a

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 10
incomplete q

Ans 2:

Class : Class 6
incompete question

Ans 3:

Class : Class 8
Incomplete question .this had never happened before:(

Ans 4:

Class : Class 9
Incomplete Question.

Ans 5:

Class : Class 7
I AGREE WITH YOU GUYS

Ans 6:

Class : Class 8
incomplete question with no solution

Ans 7:

Class : Class 6
incomplete

Ans 8:

Class : Class 7
incomplete question

Ans 9:

Class : Class 8
Wrong question. I expected more accurate question.

Ans 10:

Class : Class 10
Incomplete question

Ans 11:

Class : Class 10

Ans 12:

Class : Class 8
incomplete question, no solution

Ans 13:

Class : Class 9

Ans 14:

Class : Class 6
this question is wrong because you have only given the cost of the first hour

Ans 15:

Class : Class 8
SOF you are the worst olympiad trainer

Ans 16:

Class : Class 5
incomplete question .can not find the answer

Ans 17:

Class : Class 7
SOF IS THE WORST

Ans 18:

Class : Class 8

Ans 19:

Class : Class 7

Ans 20:

Class : Class 4
incomplete question

Ans 21:

Class : Class 7

Ans 22:

Class : Class 6

Ans 23:

Class : Class 9
question is completed in pdf

Ans 24:

Class : Class 6
Incomplete question.

Ans 25:

Class : Class 10

Ans 26:

Class : Class 5

Ans 27:

Class : Class 5
Incomplete que

Ans 28:

Class : Class 8

Ans 29:

Class : Class 8
I am speechless

Ans 30:

Class : Class 6
This is an incomelete question!!!!!!!!!!!!

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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 6
the answer should be option C

Ans 2:

Class : Class 7
Answer should be C

Ans 3:

Class : Class 6
c

Ans 4:

Class : Class 10

Ans 5:

Class : Class 9
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 6:

Class : Class 10
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 7:

Class : Class 7
Cccc!

Ans 8:

Class : Class 7
ans should be C

Ans 9:

Class : Class 7
ans should be cccc.

Ans 10:

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

Ans 11:

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 12:

Class : Class 6
The CORRECT answer is CCCCCCCCCCC mr SOF

Ans 13:

Class : Class 9
THE ANSWER IS - B

Ans 14:

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 15:

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 16:

Class : Class 8
C

Ans 17:

Class : Class 7
c

Ans 18:

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

Ans 19:

Class : Class 6
Ans c only makes sense

Ans 20:

Class : Class 9
and should be c

Ans 21:

Class : Class 7
look at solution please

Ans 22:

Class : Class 6
My explaination is when we decrease a number by 1/10 times example 100 / 1/10 = 1000 so it increases by 10. If in place of decrease it was increase then b would be the answer but actual answer is c.

Ans 23:

Class : Class 6
Ans is C, the most sigma

Ans 24:

Class : Class 9
THE ANSWER SHOULD BE (B) PLEASE VERIFY SOF!!!!

Ans 25:

Class : Class 7
Remember LEFT TO RIGHT

Ans 26:

Class : Class 8
Decreases means division and increases means multiplication.Over here it says decreases and therefore it is division.For example let us take 100.(B) 100/ 1/10 = 100 * 10 = 1000(C)100/10 = 10Therefore,C is correct as 1 moves from left to right.

Ans 27:

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 28:

Class : Class 6
Ans should be (c)

Ans 29:

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 30:

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

Ans 31:

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 32:

Class : Class 6
The and should be C

Ans 33:

Class : Class 7

Ans 34:

Class : Class 10

Ans 35:

Class : Class 5
correct ans. should be C

Ans 36:

Class : Class 7

Ans 37:

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

Ans 38:

Class : Class 7
decreasing by 1/10 is not possible . the answer should be (c)

Ans 39:

Class : Class 8
correct ans. should be C

Ans 40:

Class : Class 9
Its C

Ans 41:

Class : Class 10
answer should be c

Ans 42:

Class : Class 8

Ans 43:

Class : Class 10

Ans 44:

Class : Class 9
in synopsis its given that the place value decreases by 10

Ans 45:

Class : Class 9
The answer is B cause they are saying step by step from LEFT to RIGHT that means it is increasing but as they have said decreasing the answer is B . eg- 10 increases by 10 when it goes from tens to hundred. So it decreases by this formula - 10 divided by 1/10 ( dividing a whole number by a fraction = whole number X the reciprocal of the fraction) = 10x10 = 100

Ans 46:

Class : Class 8
answer should be c not b

Ans 47:

Class : Class 9
As he is saying times, it should be 10 and not 1/10. So, answer should be C

Ans 48:

Class : Class 7
ans should be c

Ans 49:

Class : Class 10

Ans 50:

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 51:

Class : Class 10
The answer is (c)

Ans 52:

Class : Class 9
c

Ans 53:

Class : Class 7
c

Ans 54:

Class : Class 7
Answer should be C

Ans 55:

Class : Class 6
Ans is (c).

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