number of natural numbers

AIEEE Preparation › Algebra questions › number of natural numbers

The number of natural numbers less than 2.10⁴ which can be formed with digits 1,2,3 only are ?

UP 0 DOWN 0 0 4
Post on FacebookPost anonymously?

4 Answers

Devil ·2009-09-07 01:15:11

So we require naturals less than 20,000 (5-digit)

Till 4 digits, we have 3+3^2+3^3+3^4=3+9+27+81=120 numbers.
From 5-digit onwards, 1st place can be filled in 1 way.....So ans should be
120+3^4=201 numbers......(if my calculations are correct!)

UP 0 DOWN 0
Post on FacebookPost anonymously?

eureka123 ·2009-09-07 02:40:38

Me too same answs.....

UP 0 DOWN 0
Post on FacebookPost anonymously?

1 ·2009-09-07 03:10:38

@EUREKA123
Why r u copying other answers DIRECTLY

UP 0 DOWN 0
Post on FacebookPost anonymously?

Lokesh Verma ·2009-09-07 03:23:03

Snachit.. aka osama your IP is being banned.

UP 0 DOWN 0
Post on FacebookPost anonymously?

Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

Close [X]

number of natural numbers

4 Answers

Your Answer

Add Image

Similar Questions