International Maths Olympiad Forum By SOF Olympiad Trainer

Shrinidhi from Maharishi Vidya Mandir, Hyderabad

Subject :IMO Class : Class 6

Sanya bought two dozen similar pens. She gave the cashier two Rs 100 notes and received Rs 13.60 as change. How much did each pen cost?

ARs 7.77
BRs 6.76
CRs 5.87
DRs 8.46

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RISHABH from BHARATIYTA VIDYA BHAVAN, KOLKATA

Subject :IMO Class : Class 8

Raman has enough money to buy 30 books worth ₹ 20 each. If the price of each book is increased by ₹ 30, then how many books can he buy with the same amount of money?

A 12
B 15
C 18
D 20

it should be 12 no doubt

Ans 1:

Vihaan Nair from Ambassador School, DUBAI

Class : Class 8

The solution states different answer than so-called "correct answer".!!

Ans 2:

stavya from dps noida, noida

Class : Class 8

Ans 3:

Soham Mukherjee from The Millennium, Dubai

Class : Class 8

Ans 4:

Aarush Babbar from Birla Vidya Niketan New Delhi, New Delhi

Class : Class 8

should be option (a), is (a) in book

Ans 5:

Arkajyoti Das from techno, Cooch Behar

Class : Class 9

wrong answer

Ans 6:

Pallav Agarwal from DLF PUBLIC SCHOOL SAHIBABAD, Ghaziabad

Class : Class 9

sof answer is wrong

Ans 7:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore

Class : Class 9

correct this SOFwe hv to put it here because you don't correct it

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Anurag Dey from DPS Paradip, Paradip

Subject :IMO Class : Class 9

Vikas has ₹ (x³ + 2ax + b), with this money he can buy exactly (x – 1) jeans or (x + 1) shirts with no money left. How much money Vikas has, if x = 4?

A₹ 80
B₹ 120
C₹ 30
D₹ 60

Ans 1:

Divya Sinha from NPS International School, Singapore

Class : Class 9

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Soham chheda from Anchorwala, Navi Mumbai

Subject :IMO Class : Class 7

A figure has a rotational symmetry of order more than 1, the angle of rotation can be

A 21°
B 22°
C 23°
D 24°

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Soham chheda from Anchorwala, Navi Mumbai

Subject :IMO Class : Class 7

Match the following.

A (P) → (iv), (Q) → (i), (R) → (ii), (S) → (iii)
B (P) → (iv), (Q) → (iii), (R) → (ii), (S) → (i)
C (P) → (ii), (Q) → (iv), (R) → (iii), (S) → (i)
D (P) → (ii), (Q) → (i), (R) → (iv), (S) → (iii)

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Soham chheda from Anchorwala, Navi Mumbai

Subject :IMO Class : Class 7

Select the CORRECT match.

A Infinite order of rotational symmetry
B Only two lines of symmetry
C No symmetry
D Only one line of symmetry

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Ans 1:

Soham chheda from Anchorwala, Navi Mumbai

Class : Class 8

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Dhriti Sahu from Kendriya Vidyalaya IIT Kanpur, Kanpur

Subject :IMO Class : Class 6

The preceding number of the number –6 is

A 6
B - 7
C - 5
D 5

Before can be understood as preceding in the number line. And not a simple left to right.

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Ans 1:

TAISHA AGARWAL from Modern High School for Girls, Kolkata

Class : Class 7

how

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Anurag SARKAR from Julien Day school GANGANAGAR MADYAMGRAM, madyamgram ganganagar

Subject :IMO Class : Class 2

What is the height of tree (in m) shown here?

A108 – 73
B64 – 32
C88 – 22
D99 – 65

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Ans 1:

Adri Dey from Delhi Public School, Bangalore

Class : Class 4

Ans 2:

Anurag SARKAR from Julien Day school GANGANAGAR MADYAMGRAM, madyamgram ganganagar

Class : Class 5

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Arnav Diwan from F.A.I.P.S Kuwait, Kuwait

Subject :IMO Class : Class 10

In the given figure, PQL and PRM are tangents to the circle with centre O at the points Q and R, respectively and S is a point on the circle such that ∠SQL = 50° and ∠SRM = 60°. Then, ∠QSR is equal to ______.

A60°
B70°
C50°
D55°

Here in this question the correct answer should be 70 not 50 option C is wrong, option B is the correct answer

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Devesh Kumar Shrivastava from Ramjas School, Pusa Road, New Delhi

Subject :IMO Class : Class 9

If 2^{x – 3}.32^{x – 8} = 36, then the value of x is ______.

A2
B5
C3
D1

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Ans 1:

Ashvik Banerjee from Mount Litera Zee School , Vasco

Class : Class 9

The question is incorrect. Please change it.

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