Question

How many odd numbers less than 1000 can be formed by using the digits 0,2,5,7 when the repetition of the digit is allowed. Explain it.

Answer 1

numbers less than 1000 = numbers will contain 3 digits, 2 digits and single digit

3 digits = 3×4×2 = 24
2 digits = 3×2 = 6
single digit = 2

now, add all the numbers = 24+6+2 =
32 numbers can be formed with 0,2,5,7

#Hassan

Answer 2

The digits less than 1000 can be 3-digits number or 2-digits number or 1-digit number

Number of 3-digit numbers that can be formed =3×4×2=24

Number of 2-digit numbers that can be formed =2×3=6

Number of 1-digit numbers is =2

Ans 12+6+2=34