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1. How many numbers are there between 100 and 1000 , in which all the digits are distinct?
A. 729
B. 648
C. 858
D. 546
2. How many three digit odd numbers can be formed by using the digits 1,2,3,4,5,6 if the repetition of digit is not allowed:
A. 216
B. 120
C. 60
D. None of these
3. There are 8 doors to a college hall. In how many ways can a student enter through one door and get out through another?
A. 12
B. 30
C. 64
D. 56
4. A lady wants to select one cotton saree and one polyster saree from a textile shop. If there are 15 cotton and 13 polyster varieties in that shop, in how many ways can she pick up two sarees?
A. 125
B. 215
C. 345
D. 195
5. How many numbers divisible by 5 and lying between 4000 and 5000 can be formed from the digits 4,5,6,7 and 8?
A. 625
B. 125
C. 25
D. 5
6. In how many ways 5 letters can be posted in 4 letter boxes?
A. 44
B. 54
C. 45
D. 55
7. How many number of four digits can be formed with the digits 1,2,3,4,5 if the digit can be repeated in any number of times?
A. 55
B. 5!
C. 625
D. 9000
8. There are 7 chairs in a row. In how many ways can 3 persons occupy any three of them
A. 240
B. 210
C. 260
D. 120
9. How many 4 digit numbers are there, when a digit may be repeated any number of times?
A. 3×43
B. 9×103
C. 104
D. 410
10. How many three digit odd numbers can be formed by using the digits 5,6,7,8 if the repetition of digits is allowed?
A. 64
B. 32
C. 24
D. None of these
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