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The sum of all those prime numbers which are less than 31, is-

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Bihar STET Paper I: Hindi (9th Sept. 2020 - Shift 1)
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  1. 129
  2. 132
  3. 137
  4. 119

Answer (Detailed Solution Below)

Option 1 : 129
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Detailed Solution

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Concept used:

Prime numbers are natural numbers greater than 1 that have no divisors other than 1 and themselves.

Calculation:

Prime numbers less than 31 = 2, 3, 5, 7, 11, 13, 17, 19, 23, and 29

Sum = 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 = 129

∴ The sum of all prime numbers less than 31 is 129.

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