Number Theory MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Number Theory, a fundamental topic in the field of Aptitude. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Number Theory MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Number Theory mcq questions that explore various aspects of Number Theory problems. Each MCQ is crafted to challenge your understanding of Number Theory principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Aptitude tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Number Theory MCQs are your pathway to success in mastering this essential Aptitude topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Number Theory. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Number Theory knowledge to the test? Let's get started with our carefully curated MCQs!

Number Theory MCQs | Page 16 of 17

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Q151.
In a two-digit, if it is known that its unit's digit exceeds its ten's digit by 2 and that the product of the given number and the sum of its digits is equal to 144, then the number is:

a.

24

b.

26

c.

42

d.

46

Discuss
Answer: (a).24
Q152.
Find a positive number which when increased by 17 is equal to 60 times the reciprocal of the number.

a.

3

b.

10

c.

17

d.

20

Discuss
Answer: (a).3
Q153.
The product of two numbers is 9375 and the quotient, when the larger one is divided by the smaller, is 15. The sum of the numbers is:

a.

380

b.

395

c.

400

d.

425

Discuss
Answer: (c).400
Q154.
The product of two numbers is 120 and the sum of their squares is 289. The sum of the number is:

a.

20

b.

23

c.

169

d.

None of these

Discuss
Answer: (b).23
Q155.
A number consists of 3 digits whose sum is 10. The middle digit is equal to the sum of the other two and the number will be increased by 99 if its digits are reversed. The number is:

a.

145

b.

253

c.

370

d.

352

Discuss
Answer: (b).253
Q156.
The sum of two number is 25 and their difference is 13. Find their product.

a.

104

b.

114

c.

315

d.

325

Discuss
Answer: (b).114
Q157.
What is the sum of two consecutive even numbers, the difference of whose squares is 84?

a.

34

b.

38

c.

42

d.

46

Discuss
Answer: (c).42
Q158.
The cube root of .000216 is:

a.

.6

b.

.06

c.

77

d.

87

Discuss
Answer: (b)..06
Q159.
What should come in place of both x in the equation:
x/√128 = √162/x

a.

12

b.

14

c.

144

d.

196

Discuss
Answer: (a).12
Q160.
The least perfect square, which is divisible by each of 21, 36 and 66 is:

a.

213444

b.

214344

c.

214434

d.

231444

Discuss
Answer: (a).213444
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