International Maths Olympiad Forum By SOF Olympiad Trainer

# User Forum Subject :IMO    Class : Class 6

Class : Class 8
its d 1\15

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Subject :IMO    Class : Class 6

## Ans 1:

Class : Class 7
INDIA invented zero and its inventor is Bramagupta or Aryabhatta

## Ans 2:

Class : Class 8
India invented 0 and its inventor is Aryabhatta.

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Subject :IMO    Class : Class 6

Class : Class 6

Class : Class 6
The answer is A

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Subject :IMO    Class : Class 4

## Ans 1:

Class : Class 4
A is the right one

Class : Class 4

Class : Class 4
Class:

## Ans 4:

Class : Class 4
b is the correct answer

## Ans 5:

Class : Class 4
I did A but then I understood that holidays end at 13 but he will join on 14

Class : Class 4

## Ans 7:

Class : Class 6
A is the right answer

## Ans 8:

Class : Class 6
B is the right answer as the date he will join is 14th Oct

Class : Class 4
no b

## Ans 10:

Class : Class 4
a is the correct answer

## Ans 11:

Class : Class 7
A is the right answer

## Ans 12:

Class : Class 5
ans is be b ma because holidays till 13th but he will join on 14th only

## Ans 13:

Class : Class 5
ans will be b because holidays till 13th but he will join on 14th

## Ans 14:

Class : Class 4
A is the correct answer.

## Ans 15:

Class : Class 5
a is the correct answer

Class : Class 4

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Subject :IMO    Class : Class 2

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Subject :IMO    Class : Class 7

Class : Class 6

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Subject :IMO    Class : Class 7

## Ans 1:

Class : Class 7
As the length of side of square is 8 cm ,so it's area will be 8×8cm which is equal to 64 sq. cm.Now ,to find the area of triangle,i.e. the unshaded area ,we have to apply the formula of (1\2×base×height).Now the base is equal to the length of the side of square I.e. 8cm and the height is 3cm.Now the area of triangle is (1\2×8×3)cm =12cm.Now we have to subtract the unshaded area from the area of whole square I.e. 64 sq.cm-12 sq.cm =52sq.cm.So the answer is option B.

## Ans 2:

Class : Class 7
As the length of side of square is 8 cm ,so it's area will be 8×8cm which is equal to 64 sq. cm.Now ,to find the area of triangle,i.e. the unshaded area ,we have to apply the formula of (1\2×base×height).Now the base is equal to the length of the side of square I.e. 8cm and the height is 3cm.Now the area of triangle is (1\2×8×3)cm =12cm.Now we have to subtract the unshaded area from the area of whole square I.e. 64 sq.cm-12 sq.cm =52sq.cm.So the answer is option B.

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Subject :IMO    Class : Class 3

Class : Class 4
B Question

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Subject :IMO    Class : Class 4

## Ans 1:

Class : Class 5
Answer is C because: LIV=54 XCIX=99 54<99 XLIV=44 XLVI=46 44<46 CCV=205 XCV=95 205>95

Class : Class 3
bad question

## Ans 3:

Class : Class 4
C C C THE ANSWER IS C

## Ans 4:

Class : Class 5
Ans is C because LIV=54 & XCIX=99 XLIV=44 & XLVI=46 CCV=205 & XCV=95 Therefore, LIVXCV

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Subject :IMO    Class : Class 9

## Ans 1:

Class : Class 9
The answer is C . B is wrong.Ans:FTF

## Ans 2:

Class : Class 9
Yes it is correct

## Ans 3:

Class : Class 9
Yes the correct answer is option C because first is false and rest are.

## Ans 4:

Class : Class 10
C option is correct......as the first is false and rest are true.

## Ans 5:

Class : Class 10
The answer is (C) --- F,T,T. Here's why:The first one is false anyway, as the '12' side is equal to (not less than, as must be) the sum of the other two '4' and '8' sides.The second one is TRUE (not false!) as I can easily construct a 90^ angle and 45^ angle with ruler and compass; and simply bisect that in-between angle to get a 67.5 angle.Even the third one is TRUE (not false) as construction of a triangle allows using a protractor for angles (that's how R.D.Sharma and my teacher do it) and ANY such triangle can be constructed. In short, my answer is correct. I marked the same, but the olympiad trainer says that it is (B) --- all are false.

## Ans 6:

Class : Class 9
answer should be FTF

## Ans 7:

Class : Class 10
Actually, the answer should be FTF which is not given in the options. Considering statement 1, the sides of the triangle are 4cm, 8cm, and 12cm. But according to inequalities of triangles, sum of any to sides of a triangle is greater than the third side. But 4+8=12; i.e. sum of the two sides is equal to the third side. So statement 1 is FALSE. Considering statement 2, it is possible to construct an angle of 67.5 only using a ruler and compass. Taking statement 3, without a base, we can't construct a triangle.