International Maths Olympiad Forum By SOF Olympiad Trainer

Sai shankar S from geethanjali vidyalaya, Bangalore

Subject :IMO Class : Class 7

Sam sold a guitar at a profit percentage of 25%. If he earns the profit of ₹ 1500, then what was the selling price of the guitar?

A₹ 6000
B₹ 6500
C₹ 7500
D₹ 5500

Ans 1:

Savir Banga from Manav Sthali School, Delhi

Class : Class 7

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venkat from narayan school, chenai

Subject :IMO Class : Class 3

Difference between the temperature shown on thermometers A and B is same as ______.

A87°C + 29°C
B68°C - 10°C
C64°C + 19°C
D29°C + 67°C

All provided options are wrong

Ans 1:

ROHAN SINGH from National public school , Bangalore

Class : Class 3

Ans 2:

SHASHI KOTHARI from ABHINAV GOBAL SCHOOL, NEW DELHI

Class : Class 3

Ans 3:

Sushama Saroj from Studyhall, Lucknow

Class : Class 3

Ans 4:

ROHAN SINGH from National public school , Bangalore

Class : Class 3

b

Ans 5:

ROHAN SINGH from National public school , Bangalore

Class : Class 3

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Ved Sinha from DL DAV MODEL SCHOOL, New Delhi

Subject :IMO Class : Class 8

Evaluate:

A
B
C
D

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Hryday18 from Greenwood Public School, Gurugram

Subject :IMO Class : Class 6

Find the minimum number of squares that must be shaded so that the given figure has a line of symmetry.

A2
B3
C4
D5

Ans 1:

Kriti V from BDHS, Bengaluru

Class : Class 6

I do not understand how they got 3 as a answer

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A V from Bombay Scottish School, Mumbai

Subject :IMO Class : Class 7

A number consists of two digits whose sum is 9. If 27 is added to the number, its digits are interchanged. Given below are the steps to find the number. Identify the wrong step.
Step 1 : Let the unit’s digit be x.
Step 2 : Then, ten’s digit = (9 - x)

∴ Number = 10 × (9 - x) + x ÷ 90 - 10x + x = (90 - 9x)
Step 3 : Adding 27 to the number 90 - 9x we get 117 - 9x
Step 4 : Number with digits interchanged is 10x + (9 - x)= 9x + 9
Step 5 :127 - 9x= 9x + 9
Step 6 : Therefore unit’s digit = 6 and ten’s digit = 3
Step 7 : Hence the number = 36.

A Step 7
B Step 5
C Step 4
D Step 3 and step 6

the division sign in the number step (step before step 3) should be changedthat is the first mistake

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Samriddhi Debnath from Garden High School, Kolkata

Subject :IMO Class : Class 3

Which of the following statements are true?
P. A cube has 6 faces and 12 sides.
Q. A cylinder has 3 faces and 0 vertices.

AOnly P
BOnly Q
CBoth P and Q
DNeither P nor Q

C

View All Answers (3)

Ans 1:

Samriddhi Debnath from Garden High School, Kolkata

Class : Class 3

C

Ans 2:

Nivaan Trisal from GIIS Banerghatta , Bangalore

Class : Class 4

Cylinder has 2 faces. Ans should be A

Ans 3:

Ritayan Bhowmick from Vibgyor, Bangalore

Class : Class 4

b

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Garv Agarwal from Somerville School Noida, Noida

Subject :IMO Class : Class 7

Aman, Rahul, Raj and Nikhil each took the same spelling test.
♦ Aman spelled 7/10 of the words correctly.
♦ Rahul spelled 3/4 of the words correctly.
♦ Raj spelled 4/5 of the words correctly.
♦ Nikhil spelled 2/3 of the words correctly.
Who spelled the least number of words correctly and arrange their fraction in ascending order?

A

B

C

D