International Maths Olympiad Forum By SOF Olympiad Trainer - Page 690

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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
Ans c only makes sense

Ans 2:

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 3:

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

Ans 4:

Class : Class 10

Ans 5:

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 6:

Class : Class 8
correct ans. should be C

Ans 7:

Class : Class 7
Remember LEFT TO RIGHT

Ans 8:

Class : Class 7
c

Ans 9:

Class : Class 10
The answer is (c)

Ans 10:

Class : Class 6
The CORRECT answer is CCCCCCCCCCC mr SOF

Ans 11:

Class : Class 7
ans should be cccc.

Ans 12:

Class : Class 8

Ans 13:

Class : Class 9
Its C

Ans 14:

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

Ans 15:

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

Ans 16:

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 17:

Class : Class 7
ans should be C

Ans 18:

Class : Class 7
ans should be c

Ans 19:

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 20:

Class : Class 6
the answer should be option C

Ans 21:

Class : Class 6
c

Ans 22:

Class : Class 9
c

Ans 23:

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 24:

Class : Class 7
Answer should be C

Ans 25:

Class : Class 7
Answer should be C

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 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 28:

Class : Class 8
C

Ans 29:

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

Ans 30:

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

Ans 31:

Class : Class 7

Ans 32:

Class : Class 7
c

Ans 33:

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 34:

Class : Class 6
Ans is (c).

Ans 35:

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 36:

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 37:

Class : Class 9
and should be c

Ans 38:

Class : Class 6
Ans is C, the most sigma

Ans 39:

Class : Class 10
answer should be c

Ans 40:

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

Ans 41:

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 42:

Class : Class 7
look at solution please

Ans 43:

Class : Class 7

Ans 44:

Class : Class 5
correct ans. should be C

Ans 45:

Class : Class 6
The and should be C

Ans 46:

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

Ans 47:

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 48:

Class : Class 8
answer should be c not b

Ans 49:

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

Ans 50:

Class : Class 6
Ans should be (c)

Ans 51:

Class : Class 10

Ans 52:

Class : Class 9
THE ANSWER IS - B

Ans 53:

Class : Class 10

Ans 54:

Class : Class 7
Cccc!

Ans 55:

Class : Class 10

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 4
b

Ans 2:

Class : Class 7
hey , it is 90 tenths cause tenths means at the tenths place only . But if if there is another no. like 90 tenths we should multiply . But if you choose hundredth tenths it it will become in thousands value.

Ans 3:

Class : Class 9
thank you

Ans 4:

Class : Class 5
b

Ans 5:

Class : Class 2
C

Ans 6:

Class : Class 3
Ya B

Ans 7:

Class : Class 5

Ans 8:

Class : Class 9
The answer is B but if anyone has doubt , please call 9243729047 . I will explain it briefly to you .

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Subject :IMO    Class : Class 5

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 4
Ok

Ans 2:

Class : Class 6
If the movie is for 2 hours it can be shown 6 times between 12 noon and 12 midnight which is 12 hours. 12/2=6. The answer is B.

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 4
Why III is false?

Ans 2: (Master Answer)

Class : Class 1
The correct answer is A.

Ans 3:

Class : Class 9
III is false because AAA is no property

Ans 4:

Class : Class 8
AAA is not a property, hence 3rd statement is false.

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 7
I agree with Ahmad

Ans 2:

Class : Class 6
Yes there are 6 letters I also agree with Ahmad

Ans 3:

Class : Class 2
how it can be a 6 I think so, there is only 5 H,O,X,S and Z

Ans 4:

Class : Class 7
h,o,x,s,n i think it is the answer

Ans 5:

Class : Class 8
I agree . There are 6 letters with a rotational line of symmetry

Ans 6:

Class : Class 8
The answer is six - H, O, S, X, Z and N.

Ans 7:

Class : Class 10
I think the thickness of the lines of X makes the answer 5

Ans 8:

Class : Class 8
Please Someone explain

Ans 9:

Class : Class 9
Yes, I too agree with Ahamad.

Ans 10:

Class : Class 10

Ans 11:

Class : Class 7
It is 7 becoz B has rotational symmetry of order2.

Ans 12:

Class : Class 7
I agree with Ahmad

Ans 13:

Class : Class 7
I agree with Ahmad.

Ans 14:

Class : Class 7
There is a mistake.Actually there are 6 lettersThose are-H, O, S, X, Z, N

Ans 15:

Class : Class 7
I agree, it should be 6 - H, O, S, X, Z and N

Ans 16:

Class : Class 8
Correct answer is 5.

Ans 17:

Class : Class 8
answer should be 6

Ans 18:

Class : Class 7
IT IS 6 RIGHT?

Ans 19:

Class : Class 7
It is five letters since H,O,S,X and Z

Ans 20:

Class : Class 8
I also agree with Ahmad

Ans 21:

Class : Class 7
please explain the answer in details

Ans 22:

Class : Class 9
HOSXZNcan u give more option

Ans 23:

Class : Class 10
I agree with Ahmad

Ans 24:

Class : Class 7
check toppers.com

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