Find the Missing Number
A sequence of numbers follows this pattern: 3, 7, 15, 31, __, 127.
What number should replace the blank?
A box of biscuits
A box of biscuits contains 36 biscuits. 20 biscuits have foil wrappers. 15 are chocolate biscuits with foil wrappers. If 9 are not chocolate and do not have a foil wrapper, then how many chocolate biscuits are there?
The given sequence of numbers is: 3, 7, 15, 31, __, 127.
ReplyDeleteLooking at the pattern:
3 × 2 = 6, and 6 + 1 = 7
7 × 2 = 14, and 14 + 1 = 15
15 × 2 = 30, and 30 + 1 = 31
31 × 2 = 62, and 62 + 1 = 63
63 × 2 = 126, and 126 + 1 = 127
Thus, the missing number is 63.