# Numerical Aptitude Tests Questions and Answers Home > Numerical Tests > Numerical Aptitude > Numerical Aptitude Questions The sum of first five prime numbers is:

A. 11
B. 18
C. 26
D. 28

### Answer & Explanation:

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 ?

A. 240
B. 270
C. 295
D. 360

### Answer & Explanation:

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 = ?

A. 725117481
B. 674217481
C. 685126481
D. None of these

### Answer & Explanation:

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:

A. 0
B. 1
C. 2
D. None of these

### Answer & Explanation:

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:

A. 103
B. 107
C. 113
D. None of these

### Answer & Explanation:

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.  #### Square and Cubic Conversion

Copyright © The Online Test Centre - Since 2005 | Terms and Conditions & Privacy Policy | Blog

The largest provider of tests on the web. We have thousands of questions covering

numerical and verbal aptitude tests, diagrammatic and logic tests, reasoning tests,

puzzles, general knowledge test questions and GMAT test advice and questions.

No login required. All tests are free. All the tests you need when you need them.