International Maths Olympiad Forum By SOF Olympiad Trainer

nikita dhingra from Delhi public school, Chandigarh, Chandigarh

Subject :IMO Class : Class 9

Seats for Mathematics, Physics and Biology in a school are in the ratio 5 : 7 : 8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio of increased seats?

A2 : 3 : 4
B6 : 7 : 8
C6 : 8 : 9
DNone of these

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monica jindal from British Co Ed high school, Patiala

Subject :IMO Class : Class 3

Which of the following letters are embedded in the Fig. (X)?

AL, W
BL, X
CO, N
DX, M

Sof

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Ans 1:

Bhargavi Vaibhav Zade from R. S. MUNDLE ENGLISH SCHOOL, NAGPUR

Class : Class 7

Ans 2:

monica jindal from British Co Ed high school, Patiala

Class : Class 7

So

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Lakshyraj yadav from The shri ram aravali school , Gurgaon

Subject :IMO Class : Class 5

Bobby prepare a cake for 4 hours 35 minutes. She prepare soup for 1 hour 20 minutes. How long Bobby takes to prepare the cake than the soup?

A3 hours 15 minutes
B3 hours 25 minutes
C5 hours 15 minutes
D5 hours 55 minutes

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Ans 1:

Wrik Chatterjee from DELHI PUBLIC SCHOOL NOIDA, Noida

Class : Class 5

a

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

Subject :IMO Class : Class 5

80 has ____ factors.

A10
B6
C8
D12

1,2,4,5,8,10,1,6,20,40,80 Total 10 factors

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

(A): The factors of 1,2,4,5,8,10,16,20,40,80

Therefore, 80 has 10 factors.

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Aryan Keswani from Delhi Public School, Mathura Road, New Delhi

Subject :IMO Class : Class 6

Ashima bought 23 things from the market. She bought five more jeans than shirts and two fewer watches than jeans. If x represents the number of shirts in total, then which sentence can be used to find how many of each thing are bought?

A x + (x + 5) + (x + 3) = 23
B x + (x - 5) + (x - 3) = 23
C (x + 5) + (x + 3) = 23
D x + (x + 3) = 23

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Ans 1:

Ojaswi from SAINT JOHNS CONVENT SCHOOL LANSDOWNE, DELHI

Class : Class 6

Ans 2:

Prapti Kumar from GD Birla Center For Education, Kolkata

Class : Class 9

Ans 3: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

(A): Number of shirts bought by Ashima = x
∴ Number of jeans bought by her = x + 5
∴ Number of watches bought by her
= (x + 5) – 2 = x + 3
∴ Total number of things bought by her
= x + (x + 5) + (x + 3) = 23

Ans 4:

Prachi from Holy Child Public school, Faridabad

Class : Class 10

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Kunsh Makani from NES, Mumbai

Subject :IMO Class : Class 1

How many of the following objects will roll but not slide?

A1
B4
C3
D0

how is answer zero. ?

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Ans 1:

Anugya from Delhi Public School Whitefield, Bangalore

Class : Class 5

Ans 2:

Samarth Shenoy from Jindal Vidya Mandir , Bellary

Class : Class 5

Ans 3: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

(D):

There is no object which can roll but not slide.

Ans 4:

Saiansh Biswas from Little Flower School, Jamshedpur

Class : Class 4

A cylinder can roll....who can answer is zero

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Arihant kumar from Delhi public school,EOK, New Delhi

Subject :IMO Class : Class 6

Fill in the blanks:
(i) Data means information in the form of _P __.
(ii) Data obtained in the _Q __form is called row data.
(iii) The number of times a particular observation occurs is called its _R __.
(iv) Arranging the numeral figures in an ascending or descending order is called an/a _S __.

	P	Q	R	S
A	Numerical figure	Frequency	Original	Array
B	Numerical figure	Original	Frequency	Array
C	Array	Frequency	Original	Numerical figure
D	Frequency	Array	Original	Numerical figure

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Ans 1:

mystic bro7pro from arbor school, Hyderabad

Class : Class 5

a

Ans 2:

Utkarsh Priyam from DSE, hyderabad

Class : Class 9

The use of word 'row' in place of 'raw' is confusing. Data in original form is called 'raw' data.

Ans 3: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is option B.

Ans 4:

SOUVAGYA SAHA from De Nobili School, DHANBAD

Class : Class 10

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

Subject :IMO Class : Class 5

How many triangles are formed in the given figure?

A23
B24
C25
DNone of these

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Ans 1:

NAMAN SINGH from SETH ANANDRAM JAIPURIA SCHOOL, Ghaziabad

Class : Class 8

Ans 2:

Ojas Garg from Fr. Agnel School Noida, Noida

Class : Class 5

yes

Ans 3: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

(A):

Triangles formed are : A, B, C, D, E, F, G,
H, I, J, K, BC, EF, BH, FJ, HI, IJ, HIJ, FJK,
BHG, DCEI, ABCDEF, XYZ
Number of triangles formed = 23.

Ans 4:

Seerat Kaur Sowanni from Deens Academy, Bangalore

Class : Class 6

yeah, it is 23

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Diti Sharma from Amity International School, Noida

Subject :IMO Class : Class 9

In ΔDEF and ΔPQR, DE = DF, ∠F = ∠P and ∠E = ∠Q. The two triangles are

A Isosceles but not necessarily congruent
B Isosceles and congruent
C Congruent but not isosceles
D Neither congruent nor isosceles