The sum of three prime numbers is 90. If one of them exceeds another by 30, then one of the numbers is:
The correct answer is 59.
Recognizing small prime numbers (like 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, etc.) is helpful for solving problems quickly. The sum of two odd numbers is always even. The sum of an odd number and an even number is always odd. These parity rules (even/odd properties) are often useful shortcuts in number theory problems.
Similar Questions
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Important Questions from Prime Numbers
Which of the following is NOT a pair of co-prime numbers?
a and b are two positive integers such that the least prime factor of a is 2 and the least prime factor of b is 5. Then the least prime factor of a + b is
If product of two prime numbers A and B (A < B) is 221, then what is the value of (4A – 3B)?
Sum of all the prime numbers between 70 and 100 is :
Which of the following is a prime number?
