International Maths Olympiad Forum By SOF Olympiad Trainer - Page 674

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
3353 is the correct (D)

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Subject :IMO    Class : Class 6

Ans 1: (Master Answer)

Class : Class 1
its {n(n+1)}/2

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 6
I think the no.of coins is 798

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5
I think option is c

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Subject :IMO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1
MN meets AN.

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 10
It is easy. It is given that rs.500 is charged for 1 hour and extra rs.50 for 1 person. The question asked is for 2 hours for 50 people. So, 2(hours) x rs.500(per hour) +50(people) x rs. 50(per person) Thus we get the answer option C which gives us 2 x 500 + 50 x 50

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Subject :IMO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 6
c-12

Ans 2:

Class : Class 1
(c)12

Ans 3:

Class : Class 6
c-12

Ans 4:

Class : Class 7
Answer-option C-12

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
The answer is (c) 2198.

Ans 2:

Class : Class 7
largest 3 digit number= 999 smallest 3 digit no = 100 Add both= 999+100= 1099 Multiply 1099*2= 2198 Answer= 2198

Ans 3:

Class : Class 5
Answer is C

Ans 4:

Class : Class 3
the answer is c

Ans 5:

Class : Class 1
(c) 2198

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Subject :IMO    Class : Class 3

Rohan's friend's birthday party starts at quarter to seven in the evening and ended at a quarter past ten. Rohan left the party 25 minutes before it ended.
A. What was the duration of the party?
B. At what time did Rohan leave the party?

              A                                    B
A3 hours                           9 : 50 p.m.
B3 hours 30 minutes         9 : 50 p.m.
C3 hours 10 minutes         8 : 50 p.m.
D3 hours 30 minutes         9 : 10 p.m.


Can you tell how to do this because there is no solution for this question. If answered, thanks very much :) :). Please answer

Ans 1:

Class : Class 7
ITS RIGHT

Ans 2:

Class : Class 7
B

Ans 3:

Class : Class 4
B is correct

Ans 4:

Class : Class 5
Answer is B

Ans 5:

Class : Class 3

Ans 6:

Class : Class 4
B? B? B?

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