Digits se khel
Class 6 Maths · Chapter 3: Number Play · NCERT Ganita Prakash section 3.4
Seekho
1-digit numbers 9 hain (1 se 9). 10 se 99 tak 90 two-digit numbers, phir 900 three-digit. Har baar 10 guna zyada!
Kisi number ka digit sum uske digits ka jod hai. Kabir ne dekha ki 77, 158 aur 914, teeno ka digit sum 14 hai.
7 + 7 = 1 + 5 + 8 = 9 + 1 + 4 = 14
Digit sum 14 wala sabse chhota number 59 hai: kam se kam digits, right mein 9. Digit sum 14 wala sabse bada 5-digit number 95,000 hai.
Digit jasoos: 1 se 100 tak digit 7 20 baar likha jaata hai: ikaai mein 10 baar (7, 17 … 97) aur dahaai mein 10 baar (70 se 79).
10 + 10 = 20
Explore: digit wheels ghumao aur digit sum dekho.
- Aisa 2-digit number banao jiska digit sum 14 ho.
- Ab digit sum 14 wala sabse chhota number banao.
- Digit sum 14 wala sabse bada 3-digit number banao.
Yaad rakho
- 9 one-digit, 90 two-digit, 900 three-digit numbers …
- Digit sum: digits jodo. Kisi digit sum ka sabse chhota number: right mein 9.
Quick check
3,705 ka digit sum kya hai?
- 12
- 14
- 15
- 3,705
Answer
15. 3 + 7 + 0 + 5 = 15.
Socho
345, 456 aur 567 (lagataar digits) ke digit sum nikaalo. Kya pattern dikhta hai?
Ek answer
12, 15, 18: 3-3 badhte hain, kyonki teeno digits har baar 1 badhte hain.
Practice
Teen levels (easy, medium, hard) ke naye sawaalon se practice karo, kuch hands-on, hints aur hal ke saath. Topic poora karne ke liye pichhle 5 mein se 4 sahi karo.