In numbers 1–100, the digit ‘7’ appears 20 times: 10 in the tens place (70–79) and 10 in the units place. In 1–1000, it appears 300 times: 100 each in the hundreds, tens, and units places. Class 6 Mathematics Ganita Prakash ...
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The largest odd 5-digit number between 35,000 and 75,000 is 75,999. The smallest number is 35,135. The number closest to 50,000 is 49,975, as it is nearer than other odd numbers. Class 6 Mathematics Chapter 3 Number Play question answer Class 6 ...
To reach the Kaprekar constant (6174), your birth year undergoes repeated operations of forming the largest and smallest digits. Typically, it takes six to seven iterations for most four-digit numbers. Class 6 Mathematics Chapter 3 Number Play question answer Class 6 NCERT ...
Estimate steps by measuring one average stride (e.g., 0.8 meters) and count approximate strides to the door. For a 12-meter distance, around 15 strides or steps suffice. Quick comparisons refine estimates for accuracy. Class 6 NCERT Ganita Prakash Chapter 3 Number ...
Collatz’s conjecture is widely believed but unproven. Every tested sequence reaches 1, but no mathematical proof confirms this for all numbers. Its simplicity versus complexity fascinates mathematicians, making it a captivating unsolved problem. Class 6 NCERT Ganita Prakash Chapter 3 Number ...