International Maths Olympiad Forum By SOF Olympiad Trainer - Page 176

# User Forum Subject :IMO    Class : Class 8

## Ans 1:

Class : Class 9
Let the sum be x. Compound interest: P(1+r/100)^n-P =x(11/10)^2-x Taking x common, x[(121/100)-1] =21x/100 Simple interest:p*r*t/100 =x*10*2/100 =x/5 Compound interest - simple interest =500 21x/100-x/5=500 x/100=500 x=50000

## Ans 2:

Class : Class 8

Subject :IMO    Class : Class 6

## Ans 1:

Class : Class 7
414720 /144 = 2880 correct answer is D

Subject :IMO    Class : Class 6

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Subject :IMO    Class : Class 6

## Ans 1: (Master Answer)

Class : Class 1

(A): Let the  other number be y.
HCF × LCM = Product of numbers
11 × 7700 = 275 × y
y = 308

Subject :IMO    Class : Class 7

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 6

## Ans 1: (Master Answer)

Class : Class 1

(C): Two plots have same perimeter:
So, 60 × 3 = 2 × ( length + 30)
90 = length + 30
Length = 60 m
Hence, area = 60 × 30 = 1800 sq. m

Subject :IMO    Class : Class 5

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Subject :IMO    Class : Class 8

Class : Class 9

Class : Class 8