International Maths Olympiad Forum By SOF Olympiad Trainer - Page 573

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 8
D)

Ans 2:

Class : Class 5
ANS- D

Ans 3:

Class : Class 5
An angle has 3 letters .Answer should be both c and d

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 9
Your answer is wrong. If the angle is 45, the direction will be south-west.for north-west, angle should be 135.

Ans 2:

Class : Class 9
Your answer is wrong. If the angle is 45, the direction will be south-west.for north-west, angle should be 135.

Ans 3:

Class : Class 7
D

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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 4
C

Ans 2:

Class : Class 3
C 24

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

Ans 3:

Class : Class 8
In the figure 'cm' is written, the solution has 'm' in it. SOF please correct it to avoid confusion.

Ans 4:

Class : Class 5

Ans 5:

Class : Class 8
answer is c

Ans 6: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 7:

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 8:

Class : Class 5
The answer is C.

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 8
Option A

Ans 2:

Class : Class 6
The answer is (D)

Ans 3:

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 4:

Class : Class 9
All knots or each knot?

Ans 5:

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 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

Ans 8:

Class : Class 9
The answer is A

Ans 9:

Class : Class 8
I agree with answer 14

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 8
None of these

Ans 12:

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 13:

Class : Class 8
118 sq.cm

Ans 14:

Class : Class 6

Ans 15:

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 16:

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

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 7
128 sq cm

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 6
The correct answer is B.

Ans 2:

Class : Class 6
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 6

Ans 4: (Master Answer)

Class : Class 1
The correct answer is B.

Ans 5:

Class : Class 8
answer is b

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Subject :IMO    Class : Class 4

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 4
easy

Ans 3:

Class : Class 5
IT'S A BIT HARD

Ans 4:

Class : Class 5
A-26

Ans 5:

Class : Class 8
26

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