Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 85, 84, 82, 79, 75, 70, 64, ?
Option 1: 59
Option 2: 57
Option 3: 82
Option 4: 76
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Correct Answer: 57
Solution : Given: 85, 84, 82, 79, 75, 70, 64, ?
Subtract the natural number in increasing order from the previous number, to get the required missing number – 85 – 1 = 84; 84 – 2 = 82; 82 – 3 = 79; 79 – 4 = 75; 75 – 5 = 70; 70 – 6 = 64; 64 – 7 = 57
So, the required missing number in the series is 57. Hence, the second option is correct.
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