International Maths Olympiad Forum By SOF Olympiad Trainer - Page 688

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Subject :IMO    Class : Class 8

Ans 1:

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 2:

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

Ans 3:

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 4:

Class : Class 8

Ans 5:

Class : Class 9
wrong answer.it should be d

Ans 6:

Class : Class 7

Ans 7:

Class : Class 9

Ans 8:

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

Ans 9:

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 10:

Class : Class 8
D is answer

Ans 11:

Class : Class 8

Ans 12:

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 13:

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 14:

Class : Class 10
Wrong question guys !

Ans 15:

Class : Class 9

Ans 16:

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 17:

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

Ans 18:

Class : Class 10
The answer is D

Ans 19:

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 20:

Class : Class 9

Ans 21:

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

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 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 24:

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

Ans 25:

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 26:

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

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Subject :IMO    Class : Class 4

Ans 1:

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

Ans 2:

Class : Class 5
Master Question

Ans 3:

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

Ans 4:

Class : Class 4

Ans 5:

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

Ans 6:

Class : Class 7
How the answer is C

Ans 7:

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

Ans 8:

Class : Class 4

Ans 9:

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

Ans 10:

Class : Class 6
yes i agree the anwer is c

Ans 11:

Class : Class 4

Ans 12:

Class : Class 1

Ans 13:

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

Ans 14: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 15:

Class : Class 4
The correct answer is c

Ans 16:

Class : Class 8

Ans 17:

Class : Class 2
Yap, the right answer is C

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

Ans 2:

Class : Class 5

Ans 3:

Class : Class 5
I THINK B IS THE ANSWER

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

Class : Class 9
Even I think the answer is B

Ans 8:

Class : Class 9

Ans 9:

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

Ans 10:

Class : Class 7

Ans 11:

Class : Class 9
b is the correct answer

Ans 12:

Class : Class 8
Plus there is no solution

Ans 13:

Class : Class 5
why are you writing same sentence

Ans 14:

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

Ans 15:

Class : Class 8
Bbbbbbbbbbb

Ans 16:

Class : Class 8
The answer is D only

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 5
master admin answer

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Subject :IMO    Class : Class 5

Ans 1:

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

Ans 2:

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 3:

Class : Class 5
sorry

Ans 4:

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

Ans 5:

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

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

Ans 8:

Class : Class 5

Ans 9:

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 10:

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

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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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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 6
we need Sof to clear some of our issues here so SOF pls respond soon

Ans 2:

Class : Class 6
ans is c

Ans 3:

Class : Class 9
The answer should be C

Ans 4:

Class : Class 6
It is B since GH is not perpendicular by the smallest of angles. EF is perpendicular since if you look at the triangles or 5-sided shapes that are made when lines AB and EF come through a square with an angle not equal to 45 degrees, the sizes are the same. This shows that AB and EF are a pair of perpendicular lines.

Ans 5:

Class : Class 8
b is totally correct just see the blocks carefully

Ans 6:

Class : Class 7
This question is itself wrong..

Ans 7:

Class : Class 7
Master answer required

Ans 8:

Class : Class 8
B is the correct answer guys, look at the blocks carefully.

Ans 9:

Class : Class 7

Ans 10:

Class : Class 5
the answer should be C

Ans 11:

Class : Class 7
it should be C

Ans 12:

Class : Class 6
It is B because the point where EF and AB met it is the centre point of 4 squares making it correct. Guys it is easy but we must know the trick (btw some questions are wrong itself )

Ans 13:

Class : Class 7
do not worry sof will make the same mistake on paper

Ans 14:

Class : Class 4
Wrong options SOF.!!!!!! Do you want us to fail

Ans 15:

Class : Class 9

Ans 16:

Class : Class 9

Ans 17:

Class : Class 6
ANS 33 is correct

Ans 18:

Class : Class 7
question itself is wrong

Ans 19:

Class : Class 5
right

Ans 20:

Class : Class 8
Ans is C..... Olympiad Trainer please give master answer or solution.

Ans 21:

Class : Class 6

Ans 22:

Class : Class 6
WHOEVER HAS STUDIED IN GURRUZI 2024 WOULD KNOW THIS ANSWER BUT THE QUESTION ITSELF IS WRONG IT SHOULD BE WHICH ONE OF FOLLOWING IS (NOT) perpendicular to Ab

Ans 23:

Class : Class 8
Answer is C

Ans 24:

Class : Class 6
AND VERY SILLY MISTAKE TOO

Ans 25:

Class : Class 8
It's cofusing

Ans 26:

Class : Class 8

Ans 27:

Class : Class 6
OMG, the question itself is wrong

Ans 28:

Class : Class 6

Ans 29:

Class : Class 6
How is the answer B?

Ans 30:

Class : Class 5
ans 7 is right. perpendicular = 90 degree intersecting straight lines

Ans 31:

Class : Class 6
The answer is C] GH Because if we count the blocks in AB then, it's4 If we count the blocks in GH then, it's4 THIS S MY FORMULAE

Ans 32:

Class : Class 8

Ans 33:

Class : Class 5

Ans 34:

Class : Class 5
the answer is d as the line needs to be a proper slant and only i-j is properly slanted

Ans 35:

Class : Class 9
All transversal lines look perpendicular

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