International Maths Olympiad Forum By SOF Olympiad Trainer - Page 466

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 2

Ans 2:

Class : Class 8
Option D

Ans 3:

Class : Class 8
Option D

Ans 4:

Class : Class 4

Ans 5:

Class : Class 8
Option D

Ans 6:

Class : Class 5
d

Ans 7:

Class : Class 7

Ans 8:

Class : Class 5
Answer is C as the question says the first and second in the number 94316875 are interchanged, which is 94316857, like that third and fourth digits will be interchanged and so on, which is 49138657. We have to find the third to the left of the seventh digit from the left end after this rearrangement. We have to see the seventh digit from the left end, which is the number 7, now, we have to find the third digit to the left end in which seven is the right end. So, it tells the third number from the right end, which is the number 6.

Ans 9: (Master Answer)

Class : Class 1

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Subject :IMO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1
It is 36650.

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 8
B is correct.

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 5
Sorry, the answer is D.

Ans 2:

Class : Class 4

Ans 3:

Class : Class 4
The answer is d.

Ans 4:

Class : Class 5

Ans 5:

Class : Class 4
c

Ans 6:

Class : Class 5
to get the answer, just do 5 5 5=15

Ans 7:

Class : Class 5
Answer is C as the question says the combinations of 1 notebook and 1 pen from 5 notebooks and 3 pens, which is 5*3=15.

Ans 8:

Class : Class 5

Ans 9:

Class : Class 1
give solution

Ans 10:

Class : Class 5
Sorry, the answer is D.

Ans 11:

Class : Class 7
D) 15

Ans 12:

Class : Class 2
a bit confusing

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Subject :IMO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
Hello. And Bye.

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Subject :IMO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 5
Answer is D as in option A, 14/100 is shaded, which means 7/50 is shaded. In option B, 22/100 is shaded, which means 11/50 is shaded. In option C 29/100 is shaded. In option D, 20/100 is shaded, which means 1/5 is shaded.

Ans 2:

Class : Class 4

Ans 3:

Class : Class 7
d) 20/100 because 20/100 is equivalent fraction of 1/5

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Subject :IMO    Class : Class 9

Ans 1:

Class : Class 9
option (c)

Ans 2:

Class : Class 8
IMO says Answer is B. Google says Answer is A. https://math.stackexchange.com/questions/7717/difference-between-axioms-theorems-postulates-corollaries-and-hypotheses. MathGuru says Answer is C. http://www.mathguru.com/practiceexercise/2009050500001579/pe.pdf

Ans 3:

Class : Class 9
C

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Subject :IMO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 5
Answer is C as the question says that Sid wakes up at 6:10 a.m., which is 6 hours 10 minutes of morning, next, the question says he takes 40 minutes to get dressed, 10 minutes to eat breakfast and 25 minutes to reach school, which means 45 min+10 min+25 min=80 min=1 hr 20 min. Then, 6:10 a.m.+1 hr 20 min=7:30 a.m.

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