0
For each number, there are four digits, and for each digit, there are two possibilities for digits: 3 or 4. So the number of 4-digit numbers is 2*2*2*2 = 16. The 4-digit numbers using 3 and 4 are:
3333
3334
3343
3344
3433
3434
3443
3444
4333
4334
4343
4344
4433
4434
4443
4444
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Continue Learning about Math & Arithmetic
How many numbers can you write using three twos and no other symbols?
three.. 2, 22, 222
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How many digits do you need to write if you write all numbers from 0-1450?
You would need infinitely many digits to write all numbers. However, to write all whole number (integers) you would need 4243.
If you write all the numbers from 1 to 99 how many times will you write 1?
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