How many numbers of five digits can be formed with the digits 1, 3, 5, 7 and 9, no digit being repeated?
A). 120
B). 140
C). 160
D). 180
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4. How many necklaces of 12 beads can be made from 18 beads of various colours ?
6. Using all the letters of the word "THURSDAY", how many different words can be formed?
7. Find the number of ways in which 8064 can be resolved as the product of two factors?
8. Find the number of ways in which 5 players out of 8 players can be selected to form a team.
10. In how many different ways can the letters of the word 'TROUBLE' be arranged?