📘 MATHS⚡ Speed MathsLevel 3 · Squares, Roots aur DivisionChapter 174 Posts
Divisibility Shortcuts 🔍
Koi number kisi doosre number se poora divide hota hai ya nahi (remainder 0), bina division kiye, 5 second mein. 2, 5, 10: sirf last digit dekho (4590 → 0, to teeno ✅). 3 aur 9: digits add karo (234 → 2 + 3 + 4 = 9 ✅). 4 aur 8: last 2 ya 3 digits. 11: alternate digits ka difference (7392 → 11 ✅). 6, 12, 15, 18: do chhote rules ek saath. Missing digit, remainder jaldi aur dhokhe, sab asli division ke check ke saath. Har post mein timer, diagram, drill, MCQs aur Challenge.
🌱 Naye ho? Pehle Ch 1 se Ch 16 tak order se padho, phir yahan 17.1 se shuru karo. (Ch 9 abhi nahi aaya hai; use chhod kar padho.)
17.1
Divisibility Kya Hai: 2, 5 Aur 10 Ka Rule (Last Digit Dekho)
Divisible = remainder 0. 2: last digit even, 5: last digit 0 ya 5, 10: last digit 0. 3746, 1235, 4590 check ke saath
Padho →
17.2
Divisible by 3 Aur 9: Digits Add Karo (Aur 6 Ka Rule)
Digit sum se 3 aur 9 (234 → 2 + 3 + 4 = 9), repeated digit sum, aur 6 = 2 aur 3 dono
Padho →
17.3
Divisible by 4, 8 Aur 11: Last Digits Aur Alternate Sum
4: last 2 digits, 8: last 3 digits, 11: alternate digits ka difference (7392 → 11 ✅)
Padho →
17.4
Divisibility Ke Tricky Sawaal
Soch wale mushkil sawaal: 17.1–17.3 ka mix, missing digit (37□), 12, 15, 18 jaise combined rules aur dhokhe
Padho →
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