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Question : 45 of 200
Marks:
+1,
-0
Solution:
(2) The pattern is :
31 × 0.5 – 0.5 = 15.5 – 0.5= 15
15 × 1.5 – 1.5 = 22.5 – 1.5= 21
21 × 2.5 – 2.5 = 52.5 – 2.5= 50
50 × 3.5 – 3.5 = 175 – 3.5= 171.5
171.5 × 4.5 – 4.5= 771.75 – 4.5
= 767.25
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