Class 08 Playing with numbers -2 Maths Magic

 

Playing with numbers

Activity-2 : Playing with numbers

DATE:

 

AIM / Objective:

To complete the game

 

MATERIALS REQUIRED:

Pencil, scale, eraser

 

PREREQUISITE KNOWLEDGE:

Concept of number pattern

 

PROCEDURE:

 

Sneha did a Maths magic with her friend Kriti. She asked her to think a two digit number. Then she asked her to add the digits of the number and multiply the sum by 5. She asked her to add 5 to the product and multiply the result by 2. Then she asked her to divide the result by 10 and to subtract sum of the digits from this number. Sneha told Kriti that the number left is 1. Kriti is amazed.

 

LEARNING ASSESSMENT:

 

Can you help Kriti to understand how Sneha knew the answer? Can you too think of any such other trick. Try it with your friends.

 

SOLUTION: