International Maths Olympiad Forum By SOF Olympiad Trainer - Page 577

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 3
A

Ans 3:

Class : Class 4
A

Ans 4:

Class : Class 3

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
C 24

Ans 2:

Class : Class 4
C

Ans 3:

Class : Class 4
C

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Subject :IMO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1
It has been assumed to be 72 Kg. It is a hypothetical situation.

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Subject :IMO    Class : Class 5

Ans 1:

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

Ans 2:

Class : Class 5
The answer is C.

Ans 3:

Class : Class 7
Question has been formed wrongly in terms of unit of measurement as all areas should either be in cm or in m.

Ans 4:

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

Ans 5:

Class : Class 5

Ans 6:

Class : Class 8
answer is c

Ans 7: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 8:

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

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Subject :IMO    Class : Class 5

Ans 1:

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

Ans 2:

Class : Class 10
The answer is A

Ans 3:

Class : Class 8

Ans 4:

Class : Class 7
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 5:

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 6:

Class : Class 6
The answer is (D)

Ans 7:

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 8:

Class : Class 9
I agree with answer 14

Ans 9:

Class : Class 8
None of these

Ans 10:

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 11:

Class : Class 7
128 sq cm

Ans 12:

Class : Class 5
c

Ans 13:

Class : Class 8
118 sq.cm

Ans 14:

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

Ans 15:

Class : Class 6

Ans 16:

Class : Class 8
Option A

Ans 17:

Class : Class 9
All knots or each knot?

Ans 18:

Class : Class 8
118 sq.cm

Ans 19:

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 20:

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.

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Subject :IMO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

Ans 2:

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

Ans 3:

Class : Class 7
The correct answer is B.

Ans 4:

Class : Class 8
answer is b

Ans 5:

Class : Class 7

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Subject :IMO    Class : Class 4

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 5
A-26

Ans 2:

Class : Class 6
IT'S A BIT HARD

Ans 3:

Class : Class 8
26

Ans 4:

Class : Class 4
easy

Ans 5:

Class : Class 4

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7

Ans 4:

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

Ans 5: (Master Answer)

Class : Class 1
The correct answer is B.

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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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