self Maths Puzzle

If 21 books must be placed in a row. In how many ways these books can be arranged such that no two new books are arranged consecutively...........

Read Solution (Total 1)

21C2 = 210.
13 years agoHelpfull: Yes(1) No(1)

self Other Question

Find the next number
12,36,85,184,383,782,?,3180

a)1579 b)1578 c)1581 d)1583 By doing some calculation, 2+3=18, 3+5=42, 6+2=48 and find 5+6=??
A)74 B)70 C)72 D)76