Find the sum of the first five composite numbers and the five consecutive prime numbers immediately next to these composite numbers.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 120
A composite number has a factor other than 1 and itself; a prime number has only these two factors. 1 is neither, so the composite numbers begin at 4.
First five composite numbers: 4, 6, 8, 9, 10; sum \(=37\)
The next five primes after 10: 11, 13, 17, 19, 23; sum \(=83\)
Total \(=37+83=120\)