Numbers Puzzles

42. What number comes next in this sequence?
1, 3, 11, 47, ?
Answer
239
1 × 2 + 1 = 3;
3 × 3 + 2= 11;
11 × 4 + 3 = 47;
47 × 5 + 4 = 239;
43. 64521 is to 41256 as 38297 is to
a. 89732
b. 29873
c. 92837
d. 87923
e. 87932
Answer
87923
44. 83 64 45  ? ?
96 65 34  ? ?
What numbers should replace the question marks?
Answer
2 6, 0 3.
Looking across, the numbers in the same position in each pair progress: 8, 6, 4, 2; 3, 4, 5, 6; 9, 6, 3, 0; 6, 5, 4, 3.
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