Home work solution for Class 1 | Divisibility Rules (Part 1)| Calculation Technique | Number System | By Nitesh Sir

Home work solution for Class 1 | Divisibility Rules (Part 1)| Calculation Technique | Number System | By Nitesh Sir 

 Let’s check divisibility of 2, 3, 4, 5, 6, 8, 9, 10 and 11 for each given number step-by-step.

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🔢 1) Number = 7,843,218

Divisor	Test	Result
2	Last digit = 8 (even)	✅ Divisible
3	Sum = 7+8+4+3+2+1+8 = 33	✅ (33 divisible by 3)
4	Last 2 digits = 18	❌
5	Last digit ≠ 0 or 5	❌
6	Divisible by 2 & 3	✅
8	Last 3 digits = 218	❌
9	Sum = 33	❌
10	Last digit ≠ 0	❌
11	(7+4+2+8) − (8+3+1) = 21 − 12 = 9	❌

✔ Divisible by: 2, 3, 6

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🔢 2) Number = 7,892,846

Divisor	Test	Result
2	Last digit = 6	✅
3	Sum = 7+8+9+2+8+4+6 = 44	❌
4	Last 2 digits = 46	❌
5	Last digit ≠ 0 or 5	❌
6	Needs 2 & 3	❌
8	Last 3 digits = 846	❌
9	Sum = 44	❌
10	Last digit ≠ 0	❌
11	(7+9+8+6) − (8+2+4) = 30 − 14 = 16	❌

✔ Divisible by: 2 only

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🔢 3) Number = 93,475,116

Divisor	Test	Result
2	Last digit = 6	✅
3	Sum = 9+3+4+7+5+1+1+6 = 36	✅
4	Last 2 digits = 16	✅
5	Last digit ≠ 0 or 5	❌
6	Divisible by 2 & 3	✅
8	Last 3 digits = 116	❌
9	Sum = 36	✅
10	Last digit ≠ 0	❌
11	(9+4+5+1) − (3+7+1+6) = 19 − 17 = 2	❌

✔ Divisible by: 2, 3, 4, 6, 9

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📌 Final Summary

Number	Divisible by
7,843,218	2, 3, 6
7,892,846	2
93,475,116	2, 3, 4, 6, 9