Question : Directions: In the following question, a series is given with one number missing. Select the missing number from the given alternatives.
43, 45, 42, 46, 41, 47, ?
Option 1: 41
Option 2: 40
Option 3: 38
Option 4: 42
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Correct Answer: 40
Solution :
Given:
43, 45, 42, 46, 41, 47, ?
Alternately add and subtract consecutive natural numbers starting from 2 from the previous number to get the next ones.
43 + 2 = 45; 45 – 3 = 42; 42 + 4 = 46; 46 – 5 = 41; 41 + 6 = 47; 47 – 7 = 40
Therefore, 40 is the required missing number. Hence, the second option is correct.
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