SSC CGL level Question Set 30, Number System 6

30th SSC CGL level Question Set, 6th on topic Number System

SSC CGL Question Set 30 number system 6

This is the 30th question set of 10 practice problem exercise for SSC CGL exam and 6th on topic Number System. Students must complete this question set in prescribed time first and then only refer to the corresponding solution set for extracting maximum benefits from this resource.

In MCQ test, you need to deduce the answer in shortest possible time and select the right choice.

Based on our analysis and experience we have seen that, for accurate and quick answering, the student

  • must have complete understanding of the basic concepts in the topic area
  • is adequately fast in mental math calculation
  • should try to solve each problem using the basic and rich concepts in the specific topic area and
  • does most of the deductive reasoning and calculation in his or her head rather than on paper.

Actual problem solving is done in the fourth layer. You need to use your problem solving abilities to gain an edge in competition.

30th question set- 10 problems for SSC CGL exam: 6th on topic Number System - time 12 mins

Problem 1.

Thrice the square of a natural number decreased by four times the number is equal to 50 more than the number. The number is,

  1. 4
  2. 5
  3. 6
  4. 10

Problem 2.

The difference between two positive numbers is 3. If sum of their squares is 369, then the sum of the numbers is,

  1. 25
  2. 81
  3. 27
  4. 33

Problem 3.

A number consists of two digits such that the digit in the ten's place is less than the digit in the unit's place by 2. Three times the number added to $\displaystyle\frac{6}{7}$th of the reverse of the number is 108. The sum of the digits of the number is,

  1. 6
  2. 8
  3. 9
  4. 7

Problem 4.

Of three numbers, the second is twice the first and thrice the third. If the average of the numbers is 44, the difference between the first number and the third number is,

  1. 18
  2. 12
  3. 6
  4. 24

Problem 5.

A two digit number is five times the sum of its digits. If 9 is added to the number, the digits interchange their positions. The sum of the digits of the number is,

  1. 11
  2. 9
  3. 6
  4. 7

Problem 6.

In a three digit number, the digit at the hundred's place is two times the digit at the unit's place and sum of the three digits is 18. If the digits are reversed the number is reduced by 396. The difference of hundred's and ten's digits of the number is,

  1. 5
  2. 2
  3. 1
  4. 3

Problem 7.

If the sum of two numbers are multiplied by  each number separately, the products so obtained are 247 and 114. The sum of the numbers is,

  1. 20
  2. 19
  3. 21
  4. 23

Problem 8.

A two digit number is three times the sum of its digits. If 45 is added to the number, its digits are interchanged. Sum of the digits of the number is,

  1. 11
  2. 7
  3. 5
  4. 9

Problem 9.

The numbers 2272 and 875 are divided by a three digit number giving same remainders. The sum of the digits of this three digit number is,

  1. 12
  2. 13
  3. 10
  4. 11

Problem 10.

A fraction having denominator 30 and lying between $\frac{5}{8}$ and $\frac{7}{11}$ is,

  1. $\frac{19}{30}$
  2. $\frac{18}{30}$
  3. $\frac{20}{30}$
  4. $\frac{21}{30}$

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Solution to this question set

SSC CGL level Solution Set 30 on Arithmetic Number System

Tutorials

Numbers and Number system and basic mathematical operations

Factorization or finding out factors

HCF and LCM

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