International Maths Olympiad Forum By SOF Olympiad Trainer

Joshua joseph from Rajagiri public school, Aluva

Subject :IMO Class : Class 7

There are 255 boxes of different sizes large, medium and small. These boxes are in the ratio 2 : 8 : 5. Find the number of medium size boxes.

A85
B136
C192
D115

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Hanish Reddy Palavali from Whitefield Global School, Bengaluru

Subject :IMO Class : Class 7

((2 × 5)²)² is not equal to which of the following options?

A10⁹ × 0.0001
B0.1 × 10⁵
C10 × 10 × 10 × 10
D10² × 10²

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Uddish gulati from D.c.m presidency school, Ludhiana

Subject :IMO Class : Class 5

The given table shows the areas in square kilometres of some countries.

What is the difference between the areas (in square kilometres) of the largest and the smallest country?

A16,855,842
B7,500,148
C9,742,270
D13,810,979

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Arinjay Das Roy from Mis, Pune

Class : Class 6

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p lokshith ganesh from baldwin boys high school, bangalore

Class : Class 5

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Aanya Neelee from Apeejay Nerul , Navi Mumbai

Subject :IMO Class : Class 5

Mohan brushes his teeth thrice a day. How many times does he brush his teeth in a leap year?

A365
B730
C1095
D1098

I did it mental math. Ans is D

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Shuvangi Das from Vivekananda mission school, haldia

Subject :IMO Class : Class 8

For calculation of interest compounded half yearly, keeping the principal same, which of the following statements is true?

ADouble the given annual rate and half the given number of years.
BDouble the given annual rate as well as the given number of years.
CHalf the given annual rate and double the given number of years.
DHalf the given annual rate as well as the given number of years.

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ISHITA DUBE from CHINMAYA VIDYALAYA, BOKARO STEEL CITY

Subject :IMO Class : Class 9

A circular piece of paper of radius 20 cm is trimmed into the shape of the biggest possible square. Find the area of the paper cut off.

A
B800 cm²
C
D

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Luv Anand from DPS RK PURAM , NEW DELHI

Subject :IMO Class : Class 10

The algebraic sum of the deviations of a frequency distribution from its mean is _____.

A Always positive
B Always negative
C 0
D A non-zero number

answer bata do

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Purnota Ghosh from AVS, Kolkata

Subject :IMO Class : Class 8

In the given figure O and O₂ are the centre of the bigger circle of radius 3 cm and the smaller circle of radius 1.5 cm respectively and O₁ is the centre of the semi-circle of radius 1 cm, all lying on diameter AB. Find the area of shaded region.

A92/7 cm²
B88/7 cm²
C89/21 cm²
D18/7 cm²

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Suchi shah from AIS, Ahmedabad

Subject :IMO Class : Class 3

If 8 containers are needed to fill the drum of capacity 5 L, then how many such containers are needed to fill the drum of capacity 8 L 750 mL?

A20
B14
C15
D18

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Saar G from Kothari International School, Delhi

Class : Class 4

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Anvi Jain from Apeejay School, Mumbai

Subject :IMO Class : Class 10

Which of the following statements is INCORRECT ?
(i) In order to divide a line segment internally in the ratio m : n, both m and n are real numbers.
(ii) A pair of tangents can be constructed to a circle inclined at an angle of 165°.

AOnly (i)
BOnly (ii)
CBoth (i) and (ii)
DNeither (i) nor (ii)

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