1. Without actually performing the long
division, state whether the following rational
numbers will have a terminating decimal
expansion or a non-terminating repeating
decimal expansion :
13
15
3125
455
1600
17
64
(1) 3135 (2) 5
(3)
(4) 1660
29
23
129
343
2352
225775
15
35
77
3
(10) 272
50
210
Answers
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Answer:
X Y X2 Y2 XY
10
12
8
15
20
25
40 15
10
6
25
16
12
8 100
144
64
225
400
625
1600 225
100
36
625
256
144
64 150
120
48
375
320
300
320
ΣX=130 ΣY=92 ΣX2=3158 ΣY2=1450 ΣXY=1633
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