International Maths Olympiad Forum By SOF Olympiad Trainer - Page 645

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Subject :IMO    Class : Class 10

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 4

Ans 2:

Class : Class 10
The answer is D

Ans 3:

Class : Class 8
This question is unclear if synopsis does not define it

Ans 4:

Class : Class 8
A rectangle is a type of trapezium only and anyway the diagonals of a square is also equal

Ans 5:

Class : Class 9
The answer is D as Rectangle is also a special type of trapezium so it is correct . Also, the option B is correct. Option C is correct too as interior angle sum of triangle is 180 and the exterior angle sum is double i.e. 360The correct answer would be option D as isosceles trapezium also has its diagonals equal therefore it is the incorrect statement required. Therefore, the answer should be D instead of C

Ans 6:

Class : Class 9
wrong answer.it should be d

Ans 7:

Class : Class 9
A is correct. By definition, a trapezium has ONLY ONE pair of parallel sides. A rectangle has 2 pairs of parallel sides, hence it is not a trapezium.

Ans 8:

Class : Class 8
all options are true, i think option(c) should be "Triangle is a polygon whose exterior angle is double its interior angle". This way option(c) will be INCORRECT

Ans 9:

Class : Class 7
Answer should be D diagonals are equal in square as well So if diagonals are equal it need not be a rectangle

Ans 10:

Class : Class 9
Wrong Question guys both a and d look incorrect as rectangle is not a trapezium and even square's diagonals are equal.

Ans 11:

Class : Class 9
rectangle is also a trapezium because atleast one pair of sides parallel……..

Ans 12:

Class : Class 8

Ans 13:

Class : Class 9

Ans 14:

Class : Class 8
all options are correct(A) a rectangle follows all the characteristics of a trapizium. It has one pair of parllel sides. it has four sides and sum of all the angles is 360(b) it can be drawn like one angle is 90 and four sides are 40,40,50,50 than it is a rectangle which is quadrilateral(c)It is a law that sum of ext. angles in every polygon is 360 and sum of int. angles in a triangle is 180 which is half of 360(d) all the quadrilaterals that have equal diagonals follow all the rules of a rectangle like square which has two set of equal and parllel sides and its diagonals are equal. A square also has all right angles.

Ans 15:

Class : Class 9
all answers are correct, this question is wrong

Ans 16:

Class : Class 10
Both a and d options are correct, its marker wrong. Rectangle is a special trapezium and square also has all sides equal

Ans 17:

Class : Class 10
Wrong question guys !

Ans 18:

Class : Class 9
Trapezium is a quadrilateral with two parallel sides. Parallelogram is a special case of trapezium and rectangle is a special case of parallelogram, hence rectangle is a special case of trapezium

Ans 19:

Class : Class 9

Ans 20:

Class : Class 8

Ans 21:

Class : Class 8
Since the options seem incorrect, kindly report an error for this question. Hopefully this gets reviewed.

Ans 22:

Class : Class 7

Ans 23:

Class : Class 8
everyone to kindly check my panswer post it will most probably help u resolve what is the answer and please if there is any incorrect answer in my provided answer, please tell that thing.

Ans 24:

Class : Class 8
D is answer

Ans 25:

Class : Class 8
all options can be correct but if we see logically, option (D) states that "if the diagonals of a quadrilateral are equal it must be a rectangle" whereas the diagonals of a kite can also be equal.

Ans 26:

Class : Class 8
i agree, A is correct, there is no incorrect answer, as a rectangle is a special trapezium

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 4
The correct answer is c

Ans 2:

Class : Class 4

Ans 3:

Class : Class 8
If you all agree the answer is C You all will get from me a tasty little sherbet candy

Ans 4: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 5:

Class : Class 4
Anshuman malhotra from mumbai , i got it correct

Ans 6:

Class : Class 4

Ans 7:

Class : Class 1

Ans 8:

Class : Class 4
Master Question

Ans 9:

Class : Class 7
I Did not at all understand!!!!!!!

Ans 10:

Class : Class 6
yes i agree the anwer is c

Ans 11:

Class : Class 2
Yap, the right answer is C

Ans 12:

Class : Class 7

Ans 13:

Class : Class 6
Give me the sherbet candy I will give you a kindness badge I am in England

Ans 14:

Class : Class 9
I agree that the answer is C …………….. Now give me the "Sherbet Candy" Ashmi. Ha Ha Ha !!!

Ans 15:

Class : Class 7
How the answer is C

Ans 16:

Class : Class 4
Can you please explain how the answer is "c" .

Ans 17:

Class : Class 4

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 10
because its asking the unshaded figure not the shaded figure

Ans 2:

Class : Class 2
because it is unshaded not shaded.

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 8
Bbbbbbbbbbb

Ans 2:

Class : Class 6
I thought A was the answer but the answer is d

Ans 3:

Class : Class 5

Ans 4:

Class : Class 9
b is the correct answer

Ans 5:

Class : Class 5
I THINK B IS THE ANSWER

Ans 6:

Class : Class 4
It's b guys it's b not d

Ans 7:

Class : Class 5
master admin answer

Ans 8:

Class : Class 7

Ans 9:

Class : Class 5
B is only the answer because it is symetry

Ans 10:

Class : Class 8

Ans 11:

Class : Class 9
Even I think the answer is B

Ans 12:

Class : Class 5
why are you silent you dont`t have head see properly then answer me

Ans 13:

Class : Class 8
The answer is D only

Ans 14:

Class : Class 5
b is not the answer but d because in a symetry , both the sides should be opposite .

Ans 15:

Class : Class 5
why are you writing same sentence

Ans 16:

Class : Class 5
B is the correct answer and not D

Ans 17:

Class : Class 5
Guys, it's d.. due to some explanations, I clicked b.... also, the people saying b are wrong as d showed up in my test results

Ans 18:

Class : Class 8
Plus there is no solution

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5

Ans 2:

Class : Class 5
sorry

Ans 3:

Class : Class 5

Ans 4:

Class : Class 6
According to me the correct answer to this question is D] Because it has a line of symmetry from top to bottom

Ans 5:

Class : Class 5
I say B is also a line of symmetry but the correct answer is D

Ans 6:

Class : Class 5
the answer to this question can also be b because option b also has a line of symmetry

Ans 7:

Class : Class 5
But B answer is also the correct answer

Ans 8:

Class : Class 5
But B has slanting line of symmetry.The line of symmetry doesn't means only to be strategy

Ans 9:

Class : Class 8
answer is not b because the lines on top of the letter are horizontal

Ans 10:

Class : Class 5
D is the answer because it is straight but option B is not correct because over here it is slanting , and there is no such symmetry

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 7
i agree

Ans 2:

Class : Class 7
option a is correct as angle pqs is epual to angle qsa +angle ast (alternate interior angle)=70 98=28+x x=98-28 x=70 ast+tsb=180(straight angle) 70+y=180 y=180-70 y=110

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Subject :IMO    Class : Class 8

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 9
It's simple addition and subtraction. The total cost of both toys is 52.45+25.32=77.77 You gave him a hundred rupee note. So you gave him 22.23 rupees morethe actual prize which you would recieve as change. So the answer is 22.23 (100-77.77=22.23)

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