International Maths Olympiad Forum By SOF Olympiad Trainer - Page 441

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 9
The answer is Thursday.If you count 1 week (7 days) from Friday (Including Friday) you will get Thursday.So after 301 days it will Thursday.

Ans 2:

Class : Class 7
It is fly day.

Ans 3:

Class : Class 8
301st day will be friday

Ans 4:

Class : Class 9

Ans 5:

Class : Class 7

Ans 6:

Class : Class 7
ANSWER IS FRIDAY ONLY

Ans 7:

Class : Class 7
It is Friday

Ans 8:

Class : Class 8
301 days is divisible by 7 so there will be no addition or subtraction on friday. if it was not divisible by 7 then it might be someday else

Ans 9:

Class : Class 9
Yeah @chetan malviya , but we also need to check @VAISHNAVI 's answer which is also correct

Ans 10:

Class : Class 7
its friday

Ans 11:

Class : Class 7
FRIDAY

Ans 12:

Class : Class 7

Ans 13:

Class : Class 9
The solution is not clear. Please give accurate and understandable solutions .

Ans 14:

Class : Class 9

Ans 15:

Class : Class 6

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Subject :IMO    Class : Class 5
Fr

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Subject :IMO    Class : Class 4

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Subject :IMO    Class : Class 9

Ans 1:

Class : Class 9
D

Ans 2:

Class : Class 9
B

Ans 3:

Class : Class 9
B

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Subject :IMO    Class : Class 8

Given below are the steps of construction of a quadrilateral WXYZ, where WX = 7.5 cm, XY = 9 cm,
∠W = 80° , ∠X = 115° and ∠Y = 110° .
Which of the following is a wrong step?
(i) Draw WX = 7.5 cm.
(ii) Draw ∠AWX = 80° at W and ∠BXW = 115° at X.
(iii) With X as a centre and radius 9 cm, draw an arc to intersect XY at Y.
(iv) Draw ∠XYZ = 110° such that ZY meets WA at Z.

A(iii) and (iv) only
B(iii) only
C(ii) and (iv) only
D(ii) only


Please explain how statement iv is wrong

Ans 1:

Class : Class 7

Ans 2:

Class : Class 8
b

Ans 3:

Class : Class 5
no step is wrong.

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Subject :IMO    Class : Class 7

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 7
b as 1st and 2nd have 2 lines of symmetry or more

Ans 2:

Class : Class 5
Only square is a figure in this figures that has only two lines of symmetry

Ans 3:

Class : Class 10
please check it,its b

Ans 4:

Class : Class 7
SOF IS RIGHT THIS TIME GUYS.SO STOP ARGUING ON THIS QUESTION.

Ans 5:

Class : Class 9
Yeah, it should be A.

Ans 6:

Class : Class 5
Correct answer is B

Ans 7:

Class : Class 5
CORRECT ANSWER IS B.CORRECT ANSWER IS B

Ans 8:

Class : Class 8
The answer should be A. Out of the 4 figures only the square has 2 lines of symmetry. The other figures like the parallelogram and the F have 0 lines of symmetry. The isosceles triangle has one line of symmetry. And the parallelogram has 0 lines on symmetry. On the vertical axis, when we divide it into 2 parts. 1 part is higher at the upper side and the second one is higher at the lower side. The same happens with the horizontal axis.

Ans 9:

Class : Class 5
our answer is correct but your answer is wrong . The answer should be B

Ans 10:

Class : Class 5
answer should be b)

Ans 11:

Class : Class 9
the correct answer of this question is B

Ans 12:

Class : Class 5

Ans 13:

Class : Class 10
correct answer is b

Ans 14:

Class : Class 5
Correct answer is option B

Ans 15:

Class : Class 5
correct answer is B.

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8
HOW TO DO THIS ?????????

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 9
62

Ans 2:

Class : Class 8
This is not fair. Solution is correct but the answer is wrong. It is 62.

Ans 3:

Class : Class 8
Yes, it is 62

Ans 4:

Class : Class 8
wrong answer

Ans 5:

Class : Class 8
It is 62 not 52

Ans 6:

Class : Class 8
62

Ans 7:

Class : Class 8
Answer is 62

Ans 8:

Class : Class 8
Sof has many more mistakes like this

Ans 9:

Class : Class 8
62

Ans 10:

Class : Class 8
62 is the answer. 52 x 52 = 2704

Ans 11:

Class : Class 8
This is not good. SOF has too many mistakes like this. Though the solution says 62, the answer is registered as 52. Please fix this.

Ans 12:

Class : Class 9
Solution itself shows 62but it is making it wrong

Ans 13:

Class : Class 9
62 is correct

Ans 14:

Class : Class 9

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Subject :IMO    Class : Class 3

In the given figure, a large rectangle is 60 metres long and 20 metres wide. 2 small rectangles are 30 metres long and 20 metres wide each. Which of the following statements is CORRECT?


A The total length of the large rectangle is twice the total length of the small rectangle.
B The total length of the large rectangle is equal to the total length of the small rectangle.
C The total length of the large rectangle is 30 meters more than the total length of the small rectangle.
D The total length of the large rectangle is equal to 160 meters and the total length of the small rectangle is equal to 100 meters.


option A and C are both correct. If D is the correct option then instead of length you should make it more specific to say length of the boundary. A rectangle by definition has 2 sides length and breadth

Ans 1:

Class : Class 8
A and C are correct.Please write unambiguous lines. Write boundary or perimeter to be precise.as children view rectangle in length and breadth only.

Ans 2:

Class : Class 10
Please use proper words. It is perimeter. Not total length. Total length is the sum of the two longer sides.

Ans 3:

Class : Class 8
The correct answer is D because the total length of the large rectangle is 160 meters and the total length of the small rectangle is 100 meters

Ans 4:

Class : Class 3

Ans 5:

Class : Class 3
Both A and C are correct

Ans 6:

Class : Class 2
sorry I was wrong the ans is d only because total length is here equal to perimeter for this condition

Ans 7:

Class : Class 8
Answer is d.

Ans 8:

Class : Class 3
The word should be PERIMETER as the word TOTAL LENGTH [mentioned] can mean the sum of the 2 sides of the rectangle and can not be understood very well.So, according to me the answer can be both A as well as C.

Ans 9:

Class : Class 4
Yes both A and C are Correct

Ans 10:

Class : Class 4
A and C are Correct

Ans 11:

Class : Class 3

Ans 12:

Class : Class 2
both A and C are correct

Ans 13:

Class : Class 7
A and C both are correct. it should be perimeter or boundary.

Ans 14:

Class : Class 7
Please use the correct wordings, Perimeter. It’s just confusing to deal with word length.

Ans 15:

Class : Class 5
A

Ans 16:

Class : Class 3
160 is the perimeter of the big rectangle and not the length

Ans 17:

Class : Class 3
lenght should be replaced by parameter. ques.wording is wrong

Ans 18:

Class : Class 3
160 is the perimeter not the length

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