International Maths Olympiad Forum By SOF Olympiad Trainer

# User Forum Subject :IMO    Class : Class 8

## Ans 1:

Class : Class 8
yes, it was mentioned in the maths trivia a few days ago. but idk the reason.

## Ans 2:

Class : Class 8
Yes, because of the simple reason, that other polygons have edges! Circle has the same distance from the center at each and every point, whereas the distance from the center to the edges is generally lesser than that to the vertices in other polygons Thus, more area is covered in case of circles.

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Subject :IMO    Class : Class 4

## Ans 1:

Class : Class 8
you have to practice atleast 2 to 3 hours in a day maths , follow the syllabus.

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Subject :IMO    Class : Class 1

Class : Class 7
22 + 27 = 49

Class : Class 5
49

Class : Class 5
22+27=49

Class : Class 4
49

Class : Class 7
the answer is 49

Class : Class 6
49

## Ans 7:

Class : Class 7
49 is the correct answer

Class : Class 4
49

Class : Class 8
22+27=49

Class : Class 4
22+27=49

Class : Class 6
49

Class : Class 5
It is 49.

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Subject :IMO    Class : Class 1

Class : Class 4
49

Class : Class 6
49

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Subject :IMO    Class : Class 6

## Ans 1:

Class : Class 8
it may be (a+b)(a-b) so it will be a^2-b^2

## Ans 2:

Class : Class 7
what is the full question

## Ans 3:

Class : Class 6
full question please

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Subject :IMO    Class : Class 7

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Subject :IMO    Class : Class 5

## Ans 1:

Class : Class 6
Isolation triangle is nothing. It's an isosceles triangle that has 2 sides of equal length.

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Subject :IMO    Class : Class 2

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Subject :IMO    Class : Class 7

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Subject :IMO    Class : Class 7

## Ans 1:

Class : Class 9
THIS QA IS FROM IMO MTG BOOKLET 11 QA CH4

## Ans 2:

Class : Class 9
The supplements would be- x degree and 2x-45 degree. We all know that two supplements together measure 180 degrees. So, we have- x+2x-45=180 =3x-45=180 =3x=180+45 (On Transposing -45 to RHS becomes+45) =3x=225 =x=225/3 (On Transposing *3 to RHS becomes /3) =x=75 degrees (This is the first angle) So, 2nd angle= 2x-45= 2*75-45= 150-45= 105 degrees On checking, we have 105+75=180 degrees. So greater angle measures 105 degrees.(Answered and proved with explanation).

## Ans 3:

Class : Class 10
LET THE GREATER ANGLE BE x SINCE x IS 45 DEGREES LESS THAN TWO TIMES OF ITS SUPPLEMENT THEREFORE x+45=2(180-x) =>x+45=360-2x =>x+2x=360-45 =>3x=315 =>x=315/3 =>x=105 ANS. GREATER ANGLE IS 105