International Maths Olympiad Forum By SOF Olympiad Trainer

# User Forum Subject :IMO    Class : Class 7

## Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :IMO    Class : Class 6

## Ans 1:

Class : Class 7
Can u make me understand the question, Please?

## Ans 2:

Class : Class 6
answer is D because maximum water that cant be consumed is 4:1 but in the options all the ratios have more quantity of water

Class : Class 7

## Ans 4:

Class : Class 6
KThe question itself is not clear at all

## Ans 5:

Class : Class 6
can anyone explain please

## Ans 6:

Class : Class 9
Please make the question clear cut.

## Ans 7:

Class : Class 8
of coure its not its written that maximum water is only 1 part in the ratio. in the options all the parts for water are more than 1, so its none of these Pravir

Class : Class 8

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Subject :IMO    Class : Class 4

Class : Class 9
c)36 seconds

Class : Class 8
36 sec

## Ans 3:

Class : Class 5
Ball A rotates in 6 seconds, ball B in 9 seconds and ball C in 12 seconds. So we have to take out the LCM of the three numbers. LCM = 36. So the answer is 36 seconds.

Class : Class 7
36 SECONDS

## Ans 5:

Class : Class 5
Ball A rotates in 6 seconds, ball B in 9 seconds and ball C in 12 seconds. So we have to take out the LCM of the three numbers. LCM = 36. So the answer is 36 seconds.

Class : Class 4
36

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Subject :IMO    Class : Class 6

## Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

Class : Class 6

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Subject :IMO    Class : Class 6

## Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :IMO    Class : Class 6

Class : Class 7

## Ans 2:

Class : Class 6
whats the simple solution? do we have to multiply all the numbers?

## Ans 3:

Class : Class 6
plz give solution

Class : Class 4
to chaitanya LK

## Ans 5:

Class : Class 8
ans. is D. when all the given numbers [16,34,75,21,13] are multiplied,we get 1,11,38,400.this number is ending with two zeros.if this number must end with six zeros,there must be four more zeros.to achieve this,we multiply 1,11,38,400 by 10,000.

## Ans 6:

Class : Class 4
gone mad or what !!!!!! read question carefully i,m more reading questioncarefully

Class : Class 6

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Subject :IMO    Class : Class 6

## Ans 1:

Class : Class 8
its 36 As the ant which walks around the square covers 12 cm in one round and the ant which walks around the rectangle covers 18 cm in one round. To find out when they will meet you can take the LCM of the distance they cover in one round. it is 36 so they will meet after both the ants cover 36 cm. Pravir

## Ans 2:

Class : Class 10
Answer: B
We have corrected the answer. Thanks for pointing out.

Solution
Perimeter of small square = 12 cm
Perimeter of big square = 18 cm
LCM of 12 and 18 = 36

## Ans 3:

Class : Class 8
its 36 As the ant which walks around the square covers 12 cm in one round and the ant which walks around the rectangle covers 18 cm in one round. To find out when they will meet you can take the LCM of the distance they cover in one round. it is 36 so they will meet after both the ants cover 36 cm. Pravir

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Subject :IMO    Class : Class 6

## Ans 1:

Class : Class 8
Correct answer is 40 (area of path) 81(area of lawn)=121 sq mtrs. This option is not given

## Ans 2:

Class : Class 10
Answer : D

Solution
Let the length of one side of the path (outer square) be x.
Area of lawn + path = x2
Length of one side of the lawn = (x -2)
Area of path = x2 - (x-2)2 = 40
Solving the above equation x = 11
Side of lawn = 11 - 2 = 9
Area of lawn = 81 m2

Class : Class 7
c

## Ans 4:

Class : Class 8
area of the shaded region Pravir

## Ans 5:

Class : Class 7
but we had to find total area not area of lawn.....81 is only area of lawn.....the answer given is wrong

Class : Class 7

## Ans 7:

Class : Class 8
solution let the side of the lawn(without the path) is xso the side of the lawn (with the path ) =x 2area =(x 2)^2 =x^2 4 4x40 =x^2 4 4x-x^2=40 =4 4x=40-4=4x=36=4x=x=36/4=x=9area of lawn=9*9=81area of lawn(including the path)=(9 2)*(9 2)=11*11=121

## Ans 8:

Class : Class 9
area of the lawn is 81 sq mtr but your question says including the path which will be 121 sq mtr. this option is not there. You need to remove including path from the question.

## Ans 9:

Class : Class 7
wrong answer because the question says to include area of pathway as well as are of lawn

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Subject :IMO    Class : Class 6

## Ans 1:

Class : Class 6
As mean of 5 number is 12. Therefore sum of the 5 number is 12x5=60 Mean of 4 number is 14 Sum=14x4=56. Therefore the removed no.is 60-56=4

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Subject :IMO    Class : Class 6

Class : Class 8

## Ans 2:

Class : Class 5
The answer should be 42

## Ans 3:

Class : Class 9
the answer should be 42