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51.	Midway through his round a golfer hits a magnificent 210 yard drive, which brings his average length per drive for the round up to now from 156 to 162 yards. How far would he have had to hit the drive to bring his average length of drive up from 156 to 165 yards?

Answer

237 yards Eight holes average 156 = 1, 248 yards, Nine holes average 162 = 1, 458 yards (+ 210), Nine holes average 165 = 1, 485 yards (+ 237).

52.	What numbers should go on the bottom line? 3   6    9    15 8   2   10   12 11  8   19   27 19  10  29  39 ?     ?     ?     ?

Answer

30 18 48 66. Starting at the top, add pairs of numbers in each column to arrive at the next number.

53.	What number continues the following sequence? 759, 675, 335, 165, ?

Answer

80. Each number is formed by multiplying the number formed by the first two digits of the previous number by its third digit. So, 16 × 5 = 80;