Which number will come at the place of the question mark (?) in the given series?
Which number will come at the place of the question mark (?) in the given series?
निम्नलिखित में से कौन – सी संख्या दी गई श्रृंखला में प्रश्न चिह्न (?) के स्थान पर आएगी?
8, 18, 38, 78, 158, ?
Detailed Solution & Logic
Correct Answer:
318
Look at the pattern:
8 → 18 → 38 → 78 → 158
Check the rule:
$8 \times 2 + 2 = 18$
$18 \times 2 + 2 = 38$
$38 \times 2 + 2 = 78$
$78 \times 2 + 2 = 158$
So the pattern is: multiply by 2 and add 2
Next term:
$158 \times 2 + 2 = 316 + 2 = 318$
Correct answer: 318
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