International Maths Olympiad Forum By SOF Olympiad Trainer - Page 695

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 3
c

Ans 3:

Class : Class 7
this is right now i have understood

Ans 4:

Class : Class 7
how c, has been come

Ans 5:

Class : Class 9
c is the answer

Ans 6:

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

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 7
I dont see how option C is the correct option

Ans 2:

Class : Class 8
I think the answer should be B

Ans 3:

Class : Class 9
answer is option c

Ans 4:

Class : Class 9
please xplain this question

Ans 5:

Class : Class 10

Ans 6:

Class : Class 8
how is the answer C ?

Ans 7:

Class : Class 10

Ans 8:

Class : Class 8
Very complicated answer shown

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 6
SHOULD BE 18?

Ans 2:

Class : Class 3
it is 18 and 8

Ans 3:

Class : Class 3
a

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Subject :IMO    Class : Class 5

Ans 1:

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

Ans 2:

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

Ans 3:

Class : Class 10

Ans 4:

Class : Class 10
Incomplete question

Ans 5:

Class : Class 7

Ans 6:

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

Ans 7:

Class : Class 7
I AGREE WITH YOU GUYS

Ans 8:

Class : Class 8
incomplete question, no solution

Ans 9:

Class : Class 6
Incomplete question.

Ans 10:

Class : Class 10
question is completed in pdf

Ans 11:

Class : Class 10
incomplete q

Ans 12:

Class : Class 8

Ans 13:

Class : Class 6

Ans 14:

Class : Class 8
incomplete question with no solution

Ans 15:

Class : Class 5
Incomplete que

Ans 16:

Class : Class 7
incomplete question

Ans 17:

Class : Class 9
Incomplete Question.

Ans 18:

Class : Class 4
incomplete question

Ans 19:

Class : Class 9

Ans 20:

Class : Class 7
SOF IS THE WORST

Ans 21:

Class : Class 8

Ans 22:

Class : Class 6
incomplete

Ans 23:

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

Ans 24:

Class : Class 8
SOF you are the worst olympiad trainer

Ans 25:

Class : Class 6
incompete question

Ans 26:

Class : Class 10

Ans 27:

Class : Class 7

Ans 28:

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

Ans 29:

Class : Class 5

Ans 30:

Class : Class 8
I am speechless

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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 9
and should be c

Ans 2:

Class : Class 8
look at solution please

Ans 3:

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 4:

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 5:

Class : Class 10
The answer is (c)

Ans 6:

Class : Class 10

Ans 7:

Class : Class 8
c

Ans 8:

Class : Class 7

Ans 9:

Class : Class 6
c

Ans 10:

Class : Class 7

Ans 11:

Class : Class 7
Answer should be C

Ans 12:

Class : Class 8
C

Ans 13:

Class : Class 9
THE ANSWER IS - B

Ans 14:

Class : Class 6
Ans is C, the most sigma

Ans 15:

Class : Class 7
c

Ans 16:

Class : Class 7
Answer should be C

Ans 17:

Class : Class 8
answer should be c not b

Ans 18:

Class : Class 10

Ans 19:

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 20:

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

Ans 21:

Class : Class 10

Ans 22:

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 23:

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

Ans 24:

Class : Class 6
The CORRECT answer is CCCCCCCCCCC mr SOF

Ans 25:

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 26:

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 27:

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

Ans 28:

Class : Class 10

Ans 29:

Class : Class 6
The and should be C

Ans 30:

Class : Class 6
Ans should be (c)

Ans 31:

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

Ans 32:

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

Ans 33:

Class : Class 6
Ans is (c).

Ans 34:

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

Ans 35:

Class : Class 7
Cccc!

Ans 36:

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 37:

Class : Class 6
Ans c only makes sense

Ans 38:

Class : Class 10
answer should be c

Ans 39:

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 40:

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 41:

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

Ans 42:

Class : Class 5
correct ans. should be C

Ans 43:

Class : Class 7
ans should be C

Ans 44:

Class : Class 9
Its C

Ans 45:

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 46:

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 47:

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

Ans 48:

Class : Class 7
ans should be c

Ans 49:

Class : Class 6
the answer should be option C

Ans 50:

Class : Class 8
correct ans. should be C

Ans 51:

Class : Class 7
ans should be cccc.

Ans 52:

Class : Class 10
c

Ans 53:

Class : Class 7
Remember LEFT TO RIGHT

Ans 54:

Class : Class 8

Ans 55:

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

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