Numerical Aptitude Tests Questions and Answers
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The sum of first five prime numbers is:
Answer & Explanation:
Answer: Option D
Explanation: Required sum = (2 + 3 + 5 + 7 + 11) = 28.
Note: 1 is not a prime number.
Definition: A prime number (or a prime) is a natural number that has exactly two distinct natural number divisors: 1 and itself.
The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder. What is the smaller number ?
Answer & Explanation:
Answer: Option B
Explanation: Let the smaller number be x. Then larger number = (x + 1365).
x + 1365 = 6x + 15
5x = 1350
x = 270
Smaller number = 270.
72519 x 9999 = ?
Answer & Explanation:
Answer: Option A
Explanation: 72519 x 9999 = 72519 x (10000 - 1)
= 72519 x 10000 - 72519 x 1
= 725190000 - 72519
= 725117481.
If the number 517 * 324 is completely divisible by 3, then the smallest whole number in the place of * will be:
Answer & Explanation:
Answer: Option C
Explanation: Sum of digits = (5 + 1 + 7 + x + 3 + 2 + 4) = (22 + x), which must be divisible by 3.
x = 2.
The smallest 3 digit prime number is:
Answer & Explanation:
Answer: Option D
Explanation: The smallest 3-digit number is 100, which is divisible by 2.
100 is not a prime number.
√101< 11 and 101 is not divisible by any of the prime numbers 2, 3, 5, 7, 11.
101 is a prime number.
Hence 101 is the smallest 3-digit prime number.
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