International Maths Olympiad Forum By SOF Olympiad Trainer - Page 646

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 6
The answer is C.

Ans 2:

Class : Class 9
everything is written in centimetre not in metre.

Ans 3:

Class : Class 8
answer is c

Ans 4: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 5:

Class : Class 9
Question has been formed wrongly in terms of unit of measurement as all areas should either be in cm or in m.

Ans 6:

Class : Class 5
all should be in cm or m question is wrong or else the answer is (d),(C),(a),(b)

Ans 7:

Class : Class 5

Ans 8:

Class : Class 9
In the figure 'cm' is written, the solution has 'm' in it. SOF please correct it to avoid confusion.

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 10
The answer is A

Ans 2:

Class : Class 9
All knots or each knot?

Ans 3:

Class : Class 6
Ans is 122 (4×30=120 2=122

Ans 4:

Class : Class 5
In the question it is written 2m for knots, which means 122m of rope is required. If it would be given 2m for each knot then the answer is 128m.

Ans 5:

Class : Class 8
Option A

Ans 6:

Class : Class 5
Answer is C: 122. It says 2m is required for tying the "knots" which means 2m is the total length consumed the all knots. Had it said that 2m is required for each knot then the answer would be 128m.

Ans 7:

Class : Class 8
None of these

Ans 8:

Class : Class 8
118 sq.cm

Ans 9:

Class : Class 7
128 sq cm

Ans 10:

Class : Class 5
Answer: 128Explanation:Perimeter = 30 x 4 = 120Space for knots = 2 x 4 = 8 (each knot = 2m)Total (answer) = 30 x 4 2 x 4 = 128 m 128 > 120, 118 or 122 so option D. None of these is the correct option

Ans 11:

Class : Class 6
The answer is (D)

Ans 12:

Class : Class 6

Ans 13:

Class : Class 6

Ans 14:

Class : Class 8

Ans 15:

Class : Class 9
Answer should be Option C, not D, because 2 meter for knots is mentioned. It is not mentioned that 2 m is required for each knot.

Ans 16:

Class : Class 8
Answer is D, because 2m for EACH knot, so multiplying by 4 gives 8. Then adding to 120 gives answer 128. As this answer is not in options A, B and C, answer is D, none of these

Ans 17:

Class : Class 8
118 sq.cm

Ans 18:

Class : Class 5
c

Ans 19:

Class : Class 7
C is the answer to this question but it is showing that D is the answer. Master answer required

Ans 20:

Class : Class 5
option d according to SOF but it should be option c as it has said for the knots. The word ''knots'' is in plural form which means there are many knots which means it will be a l the knots counted

Ans 21:

Class : Class 10
I agree with answer 14

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 7

Ans 2: (Master Answer)

Class : Class 1
The correct answer is B.

Ans 3:

Class : Class 8
answer is b

Ans 4:

Class : Class 7
The correct answer is B.

Ans 5:

Class : Class 7
SolutionArea of larger rectangle = (22 × 8) sq. cm= 176 sq. cmArea of unshaded rectangle = (7 × 6) sq. cm= 42 sq. cmArea of square = (4 × 4) sq. cm = 16 sq. cm∴ Area of shaded region= 176 sq. cm – (42 16) sq. cm= 118 sq. cm

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Subject :IMO    Class : Class 4

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 7
IT'S A BIT HARD

Ans 2:

Class : Class 6
easy

Ans 3:

Class : Class 8
26

Ans 4:

Class : Class 5
A-26

Ans 5:

Class : Class 5

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 6
bbbbbbbbb

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7

Ans 4:

Class : Class 6

Ans 5: (Master Answer)

Class : Class 1
The correct answer is B.

Ans 6:

Class : Class 8
the answer should be B because if we multiply we will get the same answer this is my comment

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Subject :IMO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 8
Explain it..... Plz..... Help me out of it

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Subject :IMO    Class : Class 1

Ans 1:

Class : Class 2
D

Ans 2:

Class : Class 5
The answer is D

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 5
Areen copied the answer from Google.

Ans 2:

Class : Class 8
8/26

Ans 3:

Class : Class 5
The answer is A as the question says that Yashika has 8 red marbles in her bag.

Ans 4:

Class : Class 5
The answer is A as the question says that Yashika has 8 red marbles in her bag.

Ans 5:

Class : Class 9
Areen is correct

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