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from , Jamnagar
Subject :IMO    Class : Class 7

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Yash Bindal from Global Indian International School, Singapore
Subject :IMO    Class : Class 9

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Kavinkrishnan from Sri Chaitanya school, Tirupur
Subject :IMO    Class : Class 7

A number consists of two digits whose sum is 9. If 27 is added to the number, its digits are interchanged. Which of the given steps is CORRECT to find the number?
Step 1 :Let the unit’s digit be x
Step 2 :Then, ten’s digit = (9 – x)
∴ Number = 10 × (9 – x) + x
⇒ 90 – 10x + x = (90 – 9x)
Step 3 :Adding 27 to the number 90 – 9x, we get 117 – 9x
Step 4 :Number with digits interchanged is 10x + (9 – x) = 9x + 9
Step 5 :117 – 9x = 9x + 9
Step 6 :Therefore unit’s digit = 6 and ten’s digit = 3
Step 7 :Hence the number = 36.

A Only Step 4
B Both Step 1 and Step 2
C Step 1, 2, 3 and 4
D All steps are correct


how to find the solution

Ans 1:

Nitin from CHSV, Chennai
Class : Class 6
The space means addition

Ans 2:

Nitin from CHSV, Chennai
Class : Class 6
*x 3=y

Ans 3:

Nitin from CHSV, Chennai
Class : Class 6

Ans 4:

Nitin from CHSV, Chennai
Class : Class 6
The number is not only 36 (It is a number , but there are other numbers) . If you keep x as the ten's digit of the original number and y as the unit's digit of the number , any number following : x 3=y , will follow this rule .The numbers following this rule is 14 27=41 , 25 27=52 , 36 27=63 , 47 27=74 , 58 27=85 , 69 27=96 .

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Aaryaman Pradhan from De paul School , Berhampur
Subject :IMO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

(B):

(a) Total number of books in both  the libraries = 284683 + 371805
= 656488

(b) Number of more books in second library than the  first library = 371805 - 284683
= 87122


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Asmi Raniga from Indian school Ghubra, Muscat
Subject :IMO    Class : Class 5

Ans 1:

Pranjal from MVN Sector 88, Faridabad
Class : Class 5

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

(C): Quantity of syrup Mrs. Preeti had = 5 litres = 5000 ml

Quantity of Syrup she poured in each bottle = 300 ml

Number of bottles needed = 5000 ÷ 300 = 16.67
Therefore, 17 bottles are needed. 


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Aarush Pandya from Inventure Academy, Bangalore
Subject :IMO    Class : Class 2

Study the timings of daily activities of Payal as shown in the table and fill in the blanks.

• Activities that last for 1 hour in total are ___P___ and ___Q___.
• The activity that lasted for 15 minutes only is ___R___.

AP-Reading Book Q-Playing Football R-Reading Book
BP-Playing Football Q-Reading Book R-Dance Practice
CP-Playing Football Q-Reading Book R-Painting
DP-Doing Homework Q-Playing Football R-Reading Book


Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

(C):

  • Time duration for playing football = 30 minutes

           Time duration for reading book = 30 minutes
           So, activities that last for 1 hour in total are
           playing football and reading book.

  • The activity that lasted for 15 minutes only is painting.

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Abhinha Ajay Ovhal from Podar International School, Latur
Subject :IMO    Class : Class 1

Ans 1:

KARNIK NAYAL from THE MILLENNIUM SCHOOL, Noida
Class : Class 2
D

Ans 2:

Abhinha Ajay Ovhal from Podar International School, Latur
Class : Class 2

Ans 3:

Abhinha Ajay Ovhal from Podar International School, Latur
Class : Class 2

Ans 4:

KARNIK NAYAL from THE MILLENNIUM SCHOOL, Noida
Class : Class 2
D

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Vedant Sharma from Silver Oaks , Hyderabad
Subject :IMO    Class : Class 7

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Aman Saji from Indian School,Sohar,Sultanate of Oman., Sohar
Subject :IMO    Class : Class 8

Ans 1:

Umang from Angel public School, Nohar
Class : Class 8
A

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Aman Saji from Indian School,Sohar,Sultanate of Oman., Sohar
Subject :IMO    Class : Class 8

Ans 1:

Hprakash09 from Billabong high Bhopal, Bhopal
Class : Class 7

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