International Maths Olympiad Forum By SOF Olympiad Trainer

Devashrit Panda from DAV Public School, MIDNAPORE

Subject :IMO Class : Class 4

Which of the following figures (not drawn to scale) has the least perimeter?

A
B
C
D

why 36x2 , it should be 36x1

Ans 1:

Devashrit Panda from DAV Public School, MIDNAPORE

Class : Class 9

d-36 x 1unit, how 36x2 in the answer

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Devendra Pandey from Modern Public School, Jhumri Telaiya

Subject :IMO Class : Class 9

The construction of a ΔABC in which BC = 6 cm and ∠B = 50^o is not possible when (AB - AC) is equal to ________.

A5.6 cm
B5 cm
C6 cm
D4.8 cm

how it can be 6 cm when the difference of two sides of a triangle is less than the third side.

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Aadvik saini from Mvn sector 17, Faridabad

Subject :IMO Class : Class 5

Match the columns.

	Column I		Column II
(A)	MCMXCIX - MDXLIX	(i)	MMMDCXIV
(B)	MMXLV + MDLXIX	(ii)	CCCIX
(C)	MCMLVIII - MCDXCIX	(iii)	CDLIX
(D)	MDXXXIX - MCCXXX	(iv)	CDL

	(A)	(B)	(C)	(D)
A	(i)	(ii)	(iii)	(iv)
B	(ii)	(iii)	(i)	(iv)
C	(iv)	(i)	(iii)	(ii)
D	(iv)	(iii)	(ii)	(i)

Ans 1:

Akshath Ramanathan S from Sri Chaitanya Techno School, Bangalore

Class : Class 5

C

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Rebant Jain from Jayshree Periwal High School, Jaipur

Subject :IMO Class : Class 3

1456 tickets of a magic show were sold on Monday. 2043 more tickets were sold on Tuesday than the number of tickets sold on Monday. 3946 more tickets were sold on Wednesday than the number of tickets sold on Tuesday. How many tickets were sold on Monday and Wednesday altogether?

A7445
B9488
C9071
D8901

D

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Ans 1:

Aanya from Apeejay School , Delhi

Class : Class 7

Ans 2:

Dhanya Shree K Y from Vssips, Bangalore

Class : Class 3

a

Ans 3:

Aditya KJ from School, Pune

Class : Class 8

A

Ans 4:

Aanya from Apeejay School , Delhi

Class : Class 7

A

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Soham from Dav, Ahmedabad

Subject :IMO Class : Class 5

4/7 of the children in the hall are girls and the rest are boys. If there are 12 more girls than boys, how many children are there in the hall?

(A) 5000

(B) 6500

(C) 77

(D) 84

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Vivaana Ahuja from jamnabai Narsee school, mumbai

Subject :IMO Class : Class 3

The basket of fruits is _______ g heavier than the book.

A200
B195
C205
D190

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Ans 1:

Aditya KJ from School, Pune

Class : Class 8

a

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Divyansh Giri from MPVM Ganga Gurukulam, Prayagraj

Subject :IMO Class : Class 6

Match the following.

A(i) → (r), (ii) → (s), (iii) → (q), (iv) → (p)
B(i) → (p), (ii) → (q), (iii) → (r), (iv) → (s)
C(i) → (s), (ii) → (p), (iii) → (q), (iv) → (r)
D(i) → (r), (ii) → (p), (iii) → (q), (iv) → (s)

Solution(i) - 26 39 - 49 - 60 = - 96. Additive inverse is 96.(ii) 2000 516 - 517 - 1999 = 0. Predecessor is - 1.(iii) 89 units to right of - 7 is - 7 89 = 82.(iv) - 89 x = - 85 => x = 4 = -(-4)

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Ans 1:

Divyansh Giri from MPVM Ganga Gurukulam, Prayagraj

Class : Class 9

Ans 2:

Divyansh Giri from MPVM Ganga Gurukulam, Prayagraj

Class : Class 9

Solution(i) - 26 39 - 49 - 60 = - 96. Additive inverse is 96.(ii) 2000 516 - 517 - 1999 = 0. Predecessor is - 1.(iii) 89 units to right of - 7 is - 7 89 = 82.(iv) - 89 x = - 85 => x = 4 = -(-4)

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Ishan Tripathi from Podar International School , Pune

Subject :IMO Class : Class 3

Neetu left Town A for Town B at 10:35 a.m. She arrived in Town B at 3:50 p.m. How long was her journey?

A4 hours 35 minutes
B5 hours 35 minutes
C4 hours 15 minutes
D5 hours 15 minutes

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Ans 1:

Vivaan Sharma from DPS Pal Road Jodhpur, JODHPUR

Class : Class 4

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Dishamrutha from indian school of excellence, bangalore

Subject :IMO Class : Class 6

Arrange the following steps of construction of an angle 120° in a correct order.
Steps of construction:
(1) Draw a ray PQ.
(2) With B as a centre, again draw an arc to intersect the first arc at C.
(3) With P as a centre and a convenient radius, draw an arc to intersect at A.
(4) Join CP to get the required angle. ∠CPQ measures 120°.
(5) With A as a centre, draw an arc with the same radius to intersect the previous arc at B.

A(1)-(4)-(2)-(3)-(5)
B(1)-(3)-(5)-(2)-(4)
C(1)-(2)-(3)-(5)-(4)
D(1)-(3)-(2)-(5)-(4)