# User Forum

Subject :IMO    Class : Class 7

Class : Class 1

Subject :IMO    Class : Class 7

## Ans 1:

Class :
FIRST MAKE THAT SIMILAR 4 TRAINGLES INSIDE A RECTANGLE WHOSE TOTAL AREA IS 28 CM SQUARE NOW WE ARE LEFT WITH FOUR EQUALITERAL TRAINGLES ARE OF WHOSE ONE IS 1/2*L/2*B/2=LB/8 FOR FOUR TRAINGLES TOTAL AREA =4*LB/8=LB/2 NOW LB=LB/2+28 LB/2=28 LB=56 CM SQAURE

## Ans 2:

Class : Class 9
how is the answer worked out?

Subject :IMO    Class : Class 6

Class : Class 6

Class : Class 6

Class : Class 6
plz explain

## Ans 4:

Class : Class 6
C.) 75

Subject :IMO    Class : Class 3

Class : Class 5

Class : Class 5

## Ans 3:

Class : Class 4
Correct ans is c. But it is shown as wrong . Please correct

## Ans 4:

Class : Class 5
c

Subject :IMO    Class : Class 3

## Ans 1:

Class : Class 4
ANS. WRONG STRAIGHT LINES-12 TRIANGLES-11 12-11=1

## Ans 2:

Class : Class 4
solution is wrong

## Ans 3:

Class : Class 4
yes 12-11 = 1 is the solution

## Ans 4:

Class : Class 4
yes, it should be 12-11 = 1

Class : Class 4
Ans. is 12-11=1

## Ans 6:

Class : Class 4
Yes number of straight line is 12 and number of triangle is 11 so 12-11=1

## Ans 7:

Class : Class 2
Solution is wrong

Class : Class 3

Class : Class 4

## Ans 10:

Class : Class 3
the answer is incorrect. It should be 12-11 = 1

Class : Class 4

## Ans 12:

Class : Class 3
12-11=1, so the answer should be D.

## Ans 13:

Class : Class 3
yes it is 12 - 11 solution is wrong

Class : Class 4

Class : Class 4

## Ans 16:

Class : Class 3
Yes, 12-11=1The answer given is wrong

## Ans 17:

Class : Class 1

Subject :IMO    Class : Class 4

## Ans 1:

Class : Class 10
Number of Rs. 10 Notes only: 260/10 = 26 Number of Rs. 5 Notes only: 260/10 = 52 Therefore Rs. 5 notes more than Rs. 10, 52-26=26 Option (B)

## Ans 2:

Class : Class 5
AFTER THE SOLUTION I FOUND IT VERY EASY

Class : Class 5

## Ans 4:

Class : Class 5

Subject :IMO    Class : Class 4

Class : Class 1

Subject :IMO    Class : Class 5

## Ans 1:

Class : Class 7
can anyone explain how there are 25 triangles. My answer is coming 21.

## Ans 2:

Class : Class 5
i got 23can anyone pls explain

Class : Class 6

Class : Class 5
my ans is 23

Class : Class 6
25

Class : Class 6
ð

## Ans 7:

Class : Class 6
able to find 25 triangles

Class : Class 5
oh okay i got it

Class : Class 5
21

## Ans 10:

Class : Class 7
thanks

Subject :IMO    Class : Class 4

Class : Class 4

## Ans 2:

Class : Class 1
answer is 11/20 as if unshaded is less than 1/2 we take it as 1/2 if it is more than 1/2 then we take it as 1 but if it is 1/2 we take it as 1/2 now count all of unshaded boxes you will get the answer

Subject :IMO    Class : Class 8

## Ans 1:

Class : Class 8
Add up the speeds and multiply with time as trains are in opposite directions.Then subtract the length of the first train. Ans -1000m

## Ans 2:

Class : Class 8
Relative velocity of two trains is 384km/hr=320/3 m/sec. Therefore,it can travel 1600m in 15 sec. Therefore, the length of the second train is (1600-600)m=1000m

Class : Class 8
1000m