Chapter 6: Number Play
Numbers sab bataaye bina bhi kuch bata dete hain, aur even-odd jaise saral vichaar paheliyan pal mein sulajhaa dete hain. Is chapter mein hum line ka khel khelenge, parity se asambhav saabit karenge, magic squares banaayenge, Bharatiya kavita ke Virahāṅka numbers se milenge, aur aksharon ke peeche chhupe ank khojenge.
Is chapter mein tum
- line aur lambaai ke niyam se jaankaari padhna
- parity se jod tay karna aur paheli asambhav saabit karna
- magic squares banaana aur poora karna
- Virahāṅka numbers se layein ginna aur cryptarithm hal karna
Topics
- Numbers Kuch Batate Hain NCERT 6.1
Niyam lambaai ko aise numbers mein badalta hai jo asli lambaai bina kram dikhaate hain.
- Parity Pehchaano NCERT 6.2
Even numbers poori jodi banaate hain; odd mein ek bachta hai.
- Grids mein Khoj NCERT 6.3
1–9 ke 3 × 3 grid mein pankti-jod (aur stambh-jod) milkar 45.
- Prakriti ka Pasandeeda Kram NCERT 6.4
n thaap ki layon (1 aur 2 ke jod) ki ginti nva Virahāṅka number.
- Chhupe Hue Ank NCERT 6.5
Cryptarithm mein ikaai stambh se shuru karo aur haasil ka dhyaan rakho.
Key words
- Parity
- number even hai ya odd
- Consecutive numbers
- ek ke baad ek aane wale numbers, jaise 51 aur 52
- Magic square
- grid jismein har pankti, stambh aur vikarn ka jod same
- Magic sum
- magic square ka saajha jod
- Virahāṅka numbers
- 1, 2, 3, 5, 8, 13 …, har ek pichhle do ka jod
- Cryptarithm
- jod jismein akshar ankon ki jagah
Summary
- "Aage kitne lambe" jaisa niyam lambaai ka kram chhupaata hai.
- Parity: odd + odd = even; nva even 2n aur nva odd 2n − 1.
- 1–9 magic square ka jod 15 aur beech 5; har line = 3 × beech.
- Virahāṅka numbers chhote-lambe aksharon ki layein ginte hain: 1, 2, 3, 5, 8, 13 …