International Maths Olympiad Forum By SOF Olympiad Trainer - Page 447

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 7
how to do this?

Ans 2:

Class : Class 7
You have to count only the squares which are shaded half or more than a half .

Ans 3:

Class : Class 1
36.5cm2

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 8
I can explain those squares you see? sof refers to them by saying small rectangles. 5are in moth

Ans 2:

Class : Class 8

Ans 3:

Class : Class 7

Ans 4:

Class : Class 8
but the figure is not proper .

Ans 5:

Class : Class 4

Ans 6:

Class : Class 6
please tell me how do you guys know that 19 rectangles were removed.

Ans 7:

Class : Class 5
To solve this, let’s analyze the problem step-by-step: Find the area of a single small rectangle: Each small rectangle has a length of 3 cm and a breadth of 2 cm. So, the area of one small rectangle is: 3   cm × 2   cm = 6   sq. cm 3cm×2cm=6sq. cm Calculate the total area of all 81 small rectangles in the big rectangle: If there are 81 small rectangles, then the area of the big rectangle is: 81 × 6   sq. cm = 486   sq. cm 81×6sq. cm=486sq. cm Count the number of small rectangles remaining in the figure: From the image, we can count the number of small rectangles remaining. By visually inspecting, there appear to be 62 small rectangles left. Calculate the area of the remaining rectangles: With 62 rectangles remaining, the area of the remaining part is: 62 × 6   sq. cm = 372   sq. cm 62×6sq. cm=372sq. cm Find the total area of the rectangles removed: Subtract the area of the remaining rectangles from the total area to find the area of the removed rectangles: 486   sq. cm − 372   sq. cm = 114   sq. cm 486sq. cm−372sq. cm=114sq. cm Thus, the total area of the rectangles removed is 114 sq. cm. The correct answer is B) 114 sq. cm.

Ans 8:

Class : Class 7
B is the answer to this question , Swarnava Pal

Ans 9:

Class : Class 6
so B is the answer

Ans 10:

Class : Class 5
14 rectangles are removed not 19 because figure is not proper

Ans 11:

Class : Class 6
bro the small square at the is an rectangle and the thing is 2 rectangle so 19 square(rectangle) are there

Ans 12:

Class : Class 10

Ans 13:

Class : Class 8
can you please tell me how you got 19. Harshit Solanki from Dps, Indore.area of 1 small rectangle = 3*2 =6 sq. cm.Total cards removed = 19 so ,19*6= 114 sq. cm.

Ans 14:

Class : Class 6
area of 1 small rectangle = 3*2 =6 sq. cm.Total cards removed = 19 so ,19*6= 114 sq. cm.

Ans 15:

Class : Class 4
Can you please explain the answer ?

Ans 16:

Class : Class 8

Ans 17:

Class : Class 6

Ans 18:

Class : Class 7

Ans 19:

Class : Class 5
Figure is not proper.

Ans 20:

Class : Class 6

Ans 21:

Class : Class 5

Ans 22:

Class : Class 4
HOW DID YOU GET 19 rectangles

Ans 23:

Class : Class 5
duuuuuumb solution

Ans 24:

Class : Class 5
Bis the answer

Ans 25:

Class : Class 6

Ans 26:

Class : Class 8

Ans 27:

Class : Class 5

Ans 28:

Class : Class 6

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 8
A IS THE CORRECT ANSWER

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 7
Give explanations of questions

Ans 2:

Class : Class 7
guys if you gotit wrong check maybe yo miscalculated it actually this whole question is based on the negative and positive sign as you can clearly see - x - is

Ans 3:

Class : Class 10
HiWho gives all olympiads

Ans 4:

Class : Class 7

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Subject :IMO    Class : Class 7
hi

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 5
Correct answer is option D . 1560

Ans 2:

Class : Class 3

Ans 3:

Class : Class 5
1560

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 3
131

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Subject :IMO    Class : Class 9

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 9
@Ketaki Subhash view the solution and then say anything you want

Ans 2:

Class : Class 9
answer is 3 as the centre no. has to be 0 otherwise the number will never be divisible by 0. Also from 0 - 9, 0,3,6 and 9 are the only ones divisible by 3 but 0 cannot be the value of A hence the values could 3, 6 or 9. So the answer is 3

Ans 3:

Class : Class 8

Ans 4:

Class : Class 9

Ans 5:

Class : Class 8
D IS THE RIGHT ANSWER. FOR E.G. 55155,55455,55755,66366 ETC.

Ans 6:

Class : Class 8
stupid the answer is b...….

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