International Maths Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :IMO    Class : Class 3

Ans 1:

Class : Class 4
Answer is C

Ans 2:

Class : Class 5

Ans 3:

Class : Class 3
c

Ans 4:

Class : Class 3
Answer is 20 option b ,but there is a mistake in the solution, but final answer is c.

Ans 5:

Class : Class 3
Sof you don,t know addition 12 9=21

Ans 6:

Class : Class 5

Ans 7:

Class : Class 5
the ans should be D

Ans 8:

Class : Class 3
Sof really doesn't know addition true, but i am sure it is just a printing mistake

Ans 9:

Class : Class 4
Actually ans IS C but you have given wrong explanation why.In the biggest triangle there are 5 triangles

Ans 10:

Class : Class 3
Right answer is A

Ans 11:

Class : Class 4
SOF you don't know addition 12 9 = 21

Ans 12:

Class : Class 1

Ans 13:

Class : Class 3
The solution in the left side should be 8 triangles not 9.

Ans 14:

Class : Class 6

Ans 15:

Class : Class 3

Ans 16:

Class : Class 3

Ans 17:

Class : Class 5

Ans 18:

Class : Class 4

Post Your Answer

Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
MY ANSWER IS [A] TOO ..

Ans 2: (Master Answer)

Class : Class 1
The correct answer is A.

Post Your Answer

Subject :IMO    Class : Class 8

Ans 1:

Class : Class 8
Since it is in inverse proportion, 12:x::30:20 12×30=20x 360÷20=x x=18 More men= 18-12 =6 men more required

Ans 2:

Class : Class 8
B

Ans 3:

Class : Class 8
B. 6

Ans 4:

Class : Class 8
B. 6

Post Your Answer

Subject :IMO    Class : Class 8

Ans 1:

Class : Class 4

Ans 2: (Master Answer)

Class : Class 1
The correct answer is C.

Post Your Answer

Subject :IMO    Class : Class 8

Ans 1:

Class : Class 8
Hi friend, the answer for this is a^2 - 2ab - c^2 + b^2 = [a^2 - 2ab + b^2] - c^2 = (a-b)^2 - c^2 = (a-b+c)(a-b-c) As per options, answer is (a-b+c)

Ans 2:

Class : Class 5
(a-b+c)

Ans 3:

Class : Class 8
A. (a-b+c) (a-b+c)(a-b-c)

Post Your Answer

Subject :IMO    Class : Class 8

Ans 1:

Class : Class 9

Ans 2:

Class : Class 7

Post Your Answer

Subject :IMO    Class : Class 2

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

Post Your Answer

Subject :IMO    Class : Class 1

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

Post Your Answer

Subject :IMO    Class : Class 1

Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

Ans 2:

Class : Class 5

Ans 3:

Class : Class 5

Post Your Answer

Subject :IMO    Class : Class 1

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

Post Your Answer