International Maths Olympiad Forum By SOF Olympiad Trainer - Page 651

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Subject :IMO    Class : Class 10

Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

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Subject :IMO    Class : Class 10

Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

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

Ans 2:

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 3:

Class : Class 9

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 8

Ans 6:

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

Ans 7:

Class : Class 10
Wrong question guys !

Ans 8:

Class : Class 9
Since the options seem incorrect, kindly report an error for this question. Hopefully this gets reviewed.

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

Ans 11:

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 12:

Class : Class 10
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 13:

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 14:

Class : Class 9
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 15:

Class : Class 7

Ans 16:

Class : Class 10
The answer is D

Ans 17:

Class : Class 9

Ans 18:

Class : Class 9

Ans 19:

Class : Class 8
D is answer

Ans 20:

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

Ans 21:

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

Ans 22:

Class : Class 9
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 23:

Class : Class 10
rectangle is also a trapezium because atleast one pair of sides parallel……..

Ans 24:

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 25:

Class : Class 8

Ans 26:

Class : Class 9
wrong answer.it should be d

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 2
Yap, the right answer is C

Ans 2:

Class : Class 4

Ans 3:

Class : Class 1

Ans 4:

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

Ans 5:

Class : Class 7

Ans 6:

Class : Class 4

Ans 7:

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

Ans 8:

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

Ans 9:

Class : Class 7
How the answer is C

Ans 10:

Class : Class 4
The correct answer is c

Ans 11:

Class : Class 4

Ans 12:

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

Ans 13: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 14:

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

Ans 15:

Class : Class 4
Master Question

Ans 16:

Class : Class 6
yes i agree the anwer is c

Ans 17:

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

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 2
because it is unshaded not shaded.

Ans 2:

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

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Subject :IMO    Class : Class 5

Ans 1:

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

Ans 2:

Class : Class 5
I THINK B IS THE ANSWER

Ans 3:

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

Ans 4:

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

Ans 5:

Class : Class 8
The answer is D only

Ans 6:

Class : Class 9
b is the correct answer

Ans 7:

Class : Class 5
why are you writing same sentence

Ans 8:

Class : Class 9
Even I think the answer is B

Ans 9:

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

Ans 10:

Class : Class 8
Bbbbbbbbbbb

Ans 11:

Class : Class 5

Ans 12:

Class : Class 5
master admin answer

Ans 13:

Class : Class 9

Ans 14:

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

Ans 15:

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

Ans 16:

Class : Class 8
Plus there is no solution

Ans 17:

Class : Class 7

Ans 18:

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

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Subject :IMO    Class : Class 5

Ans 1:

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

Ans 2:

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 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

Class : Class 5

Ans 7:

Class : Class 5

Ans 8:

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

Ans 9:

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

Ans 10:

Class : Class 5
sorry

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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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