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IBPS RRB Officer Scale 1 Number Sense — practice questions

Explore 34 free Number Sense questions in IBPS RRB Officer Scale 1 Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Number Sense questions and exercises with answers

Showing questions 1–30 of 34.

Rubina decides to donate 16% of her monthly salary, but actually donates Rs 6567, which is 75% of what she had decided. What is her monthly salary?Read the answer and worked solution →Tap the number that does not belong (Banking Quant warm-up)Read the answer and worked solution →A basket holds 20 apples and 5 oranges. What per cent of the fruits are oranges?Read the answer and worked solution →Girls form 60 per cent of a class and there are 18 girls. How many students are in the class?Read the answer and worked solution →An item marked at Rs 840 is sold for Rs 714. What is the discount per cent?Read the answer and worked solution →A frock is listed at Rs 220 and a discount of 20 per cent is announced. What is its sale price?Read the answer and worked solution →A table marked at Rs 15,000 is available for Rs 14,400. What is the discount per cent?Read the answer and worked solution →An almirah is sold for Rs 5,225 after a discount of 5 per cent. What is its marked price?Read the answer and worked solution →Roller skates cost Rs 450 and sales tax is charged at 5 per cent. What is the bill amount?Read the answer and worked solution →An air cooler costs Rs 3,300 including a value added tax of 10 per cent. What was its price before tax?Read the answer and worked solution →Salim buys an article for Rs 784 which includes GST of 12 per cent. What is the price before GST?Read the answer and worked solution →A shop offers 10 per cent off. What is paid for jeans marked Rs 1,450 and two shirts marked Rs 850 each?Read the answer and worked solution →Arun buys skates in a sale with 20 per cent discount and pays Rs 1,600. What was the marked price?Read the answer and worked solution →A hair dryer is purchased for Rs 5,400 including 8 per cent VAT. What was the price before VAT?Read the answer and worked solution →An article is purchased for Rs 1,239 including GST of 18 per cent. What is the price before GST?Read the answer and worked solution →By what per cent is Rs 2,000 less than Rs 2,400?Read the answer and worked solution →Chameli has Rs 600 left after spending 75 per cent of her money. How much did she start with?Read the answer and worked solution →A team won 10 matches and its win percentage was 40. How many matches did it play in all?Read the answer and worked solution →72 per cent of 25 students are interested in mathematics. How many are not interested?Read the answer and worked solution →A television costs Rs 13,000 and sales tax is charged at 12 per cent. What is the total payable?Read the answer and worked solution →Key in the percentage answersRead the answer and worked solution →Complete the discount formulaRead the answer and worked solution →Money maths bingoRead the answer and worked solution →Pick the money term, fastRead the answer and worked solution →Onto the bill, or off it?Read the answer and worked solution →Tap the wrong word about moneyRead the answer and worked solution →Catch the discount wordsRead the answer and worked solution →Pop the compound growersRead the answer and worked solution →Steer into the percent laneRead the answer and worked solution →Slice the money wordsRead the answer and worked solution →

Worked practice questions

Rubina decides to donate 16% of her monthly salary, but actually donates Rs 6567, which is 75% of what she had decided. What is her monthly salary?

  1. Rs 54,800
  2. Rs 45,696
  3. Rs 8,756
  4. Rs 54,725
Show answer and solution

Correct answer: D. Rs 54,725

1. The decided amount = 6567 ÷ 0.75 = Rs 8756. 2. This decided amount is 16% of her salary. 3. Salary = 8756 ÷ 0.16 = **Rs 54,725**. _Source: IBPS RRB Officer Scale I Prelims PYQ (Examrace), Q.65_

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Tap the number that does not belong (Banking Quant warm-up)

Read exercise and reference answers
Questions
  1. Items
    1. 16
    2. 30
    3. 25
    4. 49
    Reason
    16, 25 and 49 are perfect squares (4², 5², 7²); 30 is not.
    Odd item
    30
  2. Items
    1. 23
    2. 29
    3. 33
    4. 31
    Reason
    23, 29 and 31 are prime; 33 = 3 × 11 is composite.
    Odd item
    33
  3. Items
    1. 27
    2. 36
    3. 45
    4. 50
    Reason
    27, 36 and 45 are multiples of 9; 50 is not.
    Odd item
    50
  4. Items
    1. 100
    2. 8
    3. 27
    4. 64
    Reason
    8, 27 and 64 are perfect cubes (2³, 3³, 4³); 100 is not.
    Odd item
    100
  5. Items
    1. 12
    2. 25
    3. 18
    4. 24
    Reason
    12, 18 and 24 are even; 25 is odd.
    Odd item
    25
Instructions
Tap the number that doesn't fit the rule.

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A basket holds 20 apples and 5 oranges. What per cent of the fruits are oranges?

  1. 20 per cent
  2. 25 per cent
  3. 80 per cent
  4. 50 per cent
Show answer and solution

Correct answer: A. 20 per cent

1. Total fruits = 20 apples + 5 oranges = 25. 2. Fraction that is orange = 5/25. 3. Convert to per cent: (5/25) x 100 = 20. 4. So oranges are 20 per cent and apples the remaining 80 per cent. _Source: syllabus Maths Ch7 'Comparing Quantities', section 7.1_

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More Quantitative Aptitude topics

Square RootsSimple InterestMensurationPercentagesShortcutsSimple & Compound InterestSquares And RootsMultiplication