3. Number Play (Hindi Explained with solution) | Class 6 Maths NCERT Textbook - Ganita Prakash

In this video we will study Chapter 3 - "Number Play" taken from Class 6 Maths New NCERT Textbook - "Ganita Prakash".
I have explained the chapter in hindi language also.
We will aslo solve questions from this chapter.
List of Questions answered in the video:
0:01:08 - Think about various situations where we use numbers. List five different situations in which numbers are used.
0:05:47 - Can the children rearrange themselves so that the children standing at the ends say ‘2’?
0:08:28 - Can we arrange the children in a line so that all would say only 0s?
0:10:05 - Can two children standing next to each other say the same number?
0:11:47 - There are 5 children in a group, all of different heights. Can they stand such that four of them say ‘1’ and the last one says ‘0’? Why or why not?
0:13:00 - For this group of 5 children, is the sequence 1, 1, 1, 1, 1 possible?
0:13:34 - Is the sequence 0, 1, 2, 1, 0 possible? Why or why not?
0:15:37 - How would you rearrange the five children so that the maximum number of children say ‘2’?
0:18:49 - Colour or mark the supercells in the table below.
0:20:22 - Fill the table below with only 4-digit numbers such that the supercells are exactly the coloured cells.
0:21:52 - Fill the table below such that we get as many supercells as possible. Use numbers between 100 and 1000 without repetitions.
0:23:22 - Out of the 9 numbers, how many supercells are there in the table above?
0:23:42 - Find out how many supercells are possible for different numbers of cells. Do you notice any pattern? What is the method to fill a given table to get the maximum number of supercells? Explore and share your strategy.
0:27:19 - Can you fill a supercell table without repeating numbers such that there are no supercells? Why or why not?
0:29:30 - Will the cell having the largest number in a table always be a supercell? Can the cell having the smallest number in a table be a supercell? Why or why not?
0:31:22 - Fill a table such that the cell having the second largest number is not a supercell.
0:32:07 - Fill a table such that the cell having the second largest number is not a supercell but the second smallest number is a supercell. Is it possible?
0:34:51 - Complete Table 2 with 5-digit numbers whose digits are ‘1’, ‘0’, ‘6’, ‘3’, and ‘9’ in some order. Only a coloured cell should have a number greater than all its neighbours.
0:42:37 - Identify the numbers marked on the number lines below, and label the remaining positions.
0:46:07 - Put a circle around the smallest number and a box around the largest number in each of the sequences above.
0:47:36 - Find out how many numbers have two digits, three digits, four digits, and five digits?
0:52:07 - Digit sum 14
0:55:19 - Find out the digit sums of all the numbers from 40 to 70.
0:56:26 - Calculate the digit sums of 3-digit numbers whose digits are consecutive (for example, 345). Do you see a pattern? Will this pattern continue?
0:58:57 - Among the numbers 1-100, how many times will the digit ‘7’ occur?
1:00:49 - Among the numbers 1-1000, how many times will the digit ‘7’ occur?
1:04:08 - Write all possible 3-digit palindromes using these digits.
1:06:57 - Will reversing and adding numbers repeatedly, starting with a 2-digit number, always give a palindrome? Explore and find out.
1:07:38 - Puzzle Time
1:12:52 - Take different 4-digit numbers and try carrying out these steps. Find out what happens.
1:14:43 - Carry out these same steps with a few 3-digit numbers. What number will start repeating?
1:17:47 - Try and find out all possible times on a 12-hour clock of each of these types.
1:19:21 - Find some other dates of this form from the past.
1:20:20 - Find all possible dates of this form from the past.
1:21:58 - Will any year’s calendar repeat again after some years? Will all dates and days in a year match exactly with that of another year?
1:25:20 - What is the sum of the smallest and largest 5-digit palindrome? What is their difference?
1:26:24 - The time now is 10.01. How many minutes until the clock shows the next palindromic time? What about the one after that?
1:27:38 - How many rounds does the number 5683 take to reach the Kaprekar constant?
1:32:15 - Can we make 1,000 using the numbers in the middle? Why not? What about 14,000, 15,000 and 16,000? Yes, it is possible. Explore how.
1:37:03 - Write an example for each of the below scenarios whenever possible.
1:45:28 - Below are some statements. Think, explore and find out if each of the statement is ‘Always true’, ‘Only sometimes true’ or ‘Never true’. Why do you think so? Write your reasoning.
1:51:48 - Share and discuss in class the different methods each of you used to solve these questions.
2:07:23 - Make some more Collatz sequences like those above, starting with your favourite whole numbers. Do you always reach 1?
2:20:17 - Figure it Out.
Thank You for watching.
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