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Find the missing number in the given number series:
7, 12, 20, 37, 81, 206, ?
7, 12, 20, 37, 81, 206, ?
- A324
- B306
- C200
- D280
Answer not set
Discussion 1
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CCommunity
Trick:
Look at the given series and we can surely say that the difference between two numbers is increasing
We can eliminate 200, 324, 306 and 280, as the difference between 81 and 206 is 125
Therefore difference would be greater than 125
Hence, 574 is the answer
Detailed solution:
The series follows the following pattern:
7 12 20 37 81 206 ?
+5 +8 +17 +44 +125
+3 +9 +27 +81
⇒ According to the logic the next number after 81 is 81 × 3 = 243
Now,
⇒ 125 + 243 = 368
∴ 206 + 368 = 574
Look at the given series and we can surely say that the difference between two numbers is increasing
We can eliminate 200, 324, 306 and 280, as the difference between 81 and 206 is 125
Therefore difference would be greater than 125
Hence, 574 is the answer
Detailed solution:
The series follows the following pattern:
7 12 20 37 81 206 ?
+5 +8 +17 +44 +125
+3 +9 +27 +81
⇒ According to the logic the next number after 81 is 81 × 3 = 243
Now,
⇒ 125 + 243 = 368
∴ 206 + 368 = 574