How many 4-digit numbers can be made with the numbers 7,2,9?

Question

This is not homework,I was just bord so I asked it

Answer 1

The actual answer is 3^4. for example, with 2 different numbers for 2 different digits, you can have AB, BB, BA, AA, which is equal to 2^2. Also, if you have 3 possible digits, then now you'll have AAA, ABA, AAB, ABB, BBA, BAB, BBB, ABB, which is equal to 2^3=8 You can find the amount of different numbers you can have by this formula (The amount of different numbers possible)^(The amount of digits within the number).

Answer 2

You cant make a 4 digit number with only 3 numbers...

Unless you're saying that zero is also included

Btw  

4^3 = 64

Answer 3

none cus theres only three numbers...7,2 and 9

Answer 4

Nope -- sorry;  4^3 = 81

UPDATE: Oops 3^4 = 81

And geez, some of you folks are really dumb.

3 possible digits in the 1st place * 3 in the 2nd * 3 in the 3rd * 3 in the 4th = 3^4 = 81. As in:

2222

2227

2229

2272

2277

2279

2292

2297

2299

2722

2727

2729

2772

2777

2779

2792

2797

2799

2922

2927

2929

2972

2977

2979

2992

2997

2999

7222

7227

7229

7272

7277

7279

7292

7297

7299

7722

7727

7729

7772

7777

7779

7792

7797

7799

7922

7927

7929

7972

7977

7979

7992

7997

7999

9222

9227

9229

9272

9277

9279

9292

9297

9299

9722

9727

9729

9772

9777

9779

9792

9797

9799

9922

9927

9929

9972

9977

9979

9992

9997

9999

Sheesh!

Answer 5

There are 187 numbers that can be made.