International Maths Olympiad Forum By SOF Olympiad Trainer - Page 859

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 6
The answers in options needs to be considered while answering the question. The total number of horses and soldier in the troop is 45. Let us consider option A with 40 soldiers = 80 human legs so the balance legs are 30 which is not possible for horses as they have 4 legs. Going by option B= 35 soldiers = 70 human legs. So the balance legs remains 40, which is possible for 10 horses. Now the total number of horses and soldiers are 45 so 35 soldiers+10 horses = 45 and hence is a right answer. The balance options can be checked in similar way and will be found incorrect.

Ans 2:

Class : Class 3

Ans 3:

Class : Class 6
B

Ans 4:

Class : Class 3
Explain the answer properly

Ans 5:

Class : Class 5
The way I taught my child was to try with each option, that is, start with option A, assume 40 is the number of soldiers, then calculate no of legs of soldiers, then minus that from total no. of legs, and see if the resulting number gives u the required number of horses you need in order to get a total of 45 horses and soldiers. Repeat the same for option B, C and D. Answer is B. This is how we did it: Assume 35 as no. of soldiers 35x2 = 70 legs of soldiersM Minus 70 from 110 (total legs)= 40 legs 40 horses legs = 40 divided by 4 =10 horses Therefore 35 soldiers and 10 horses = 45 soldiers and horses totally

Ans 6:

Class : Class 3
Hey you don't understand

Ans 7:

Class : Class 3
it is not a class 3 question understand that

Ans 8:

Class : Class 4
The level of the question is certainly not for Class 3. It involves use of simultaneous equations. Answer is 35 soldiers.

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 2
solution is (24*5) (48*4)=312hence answer is B

Ans 2:

Class : Class 4
D

Ans 3:

Class : Class 5
correct answer is B

Ans 4:

Class : Class 8
in the question each is missing.. the balls are for each box

Ans 5:

Class : Class 3
D

Ans 6:

Class : Class 3
Answer is D as per question

Ans 7:

Class : Class 9
B312

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Subject :IMO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :IMO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

Ans 2:

Class : Class 5
the correct answer is b

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 9
option D 31 since it is a prime number

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 4

Ans 3:

Class : Class 4
A- EMI 1970 per month 3 years = 36 months Total Amount Paid in three years 36 x 1970 = 70920 B - Rajat Paid Advance - 35000 Total Amount Paid A +B 70920+35000= 105920 Answer is C

Ans 4:

Class : Class 4
3years=36 monthsEMIper month=1970EMI in three year=72920Rajat paid in advance=35000Total amount paid=70920 35000=105920......[C] is the answer............................

Ans 5:

Class : Class 8
3 years = 36 months, and EMI paid each month= 1970/-, so the total amount paid in EMI is 36 x 1970, which is 70920. Therefore, total value of the car is 35000 + 70920 = 105920/-.

Ans 6:

Class : Class 7
C

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 7
good question

Ans 2:

Class : Class 8
I THINK C. IS NOT THE NET OF THE SOLID

Ans 3:

Class : Class 7
C is the answer of this question

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Subject :IMO    Class : Class 6

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 8
I THINK A. IS THE ANS

Ans 2:

Class : Class 8
Any number remains the same on changing their order . There is a rule a * b = b * a . what is wrong ........... I think D is correct

Ans 3:

Class : Class 6
B

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 4
Common factors are 5 and 10 ie option B

Ans 2:

Class : Class 4

Ans 3:

Class : Class 10

Ans 4:

Class : Class 4
A is the answer

Ans 5:

Class : Class 6
actually,they are asking which one has the same relationship as 40 and 70 which is 10 and 40 so, B is the correct answer

Ans 6:

Class : Class 4
The common factors of 40 and 70 are 2,5 and 10 which are same as common factors of 10 and 40. (2,5,10) and hence answer B is correct.

Ans 7:

Class : Class 4
answer is 10 and 5

Ans 8:

Class : Class 10
SORRY THE ANSWER IS A

Ans 9:

Class : Class 7
common factor is 5,10

Ans 10:

Class : Class 10
common factor is 5,10

Ans 11:

Class : Class 4
Sorry I wanted to type option number A.

Ans 12:

Class : Class 4
Common factor is 5,10

Ans 13:

Class : Class 9
common factors are 5 and 10

Ans 14:

Class : Class 8

Ans 15:

Class : Class 5
the answer is 5 and 10

Ans 16:

Class : Class 8

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