SSC CHSL Tier I Prototype D: Mini mock 1 (Percentages)

Ten original Part III (Quantitative Aptitude) questions on percentages, at the Tier I marking (+2 for a right answer, −0.50 for a wrong one) and pace (36 seconds a question, so 6 minutes). Every wrong option names the mistake it comes from.

Before you start

One timer for the whole test: 6 min.
The clock runs from the moment you start, even if you leave.
Right answer +2, wrong answer −0.5. Unanswered questions cost nothing.
Questions come in Hindi and English. Switch any question with “Language”; questions in English only cannot switch.
Only saved answers count. “Save & Next” saves the answer on screen, and so does “Mark for Review & Next”: a flagged answer still counts.
At zero the test submits itself.

10 questions, 6 minutes on the timer. +2 for each right answer, −0.50 for each wrong one, 0 for a question left blank. Skip a question that has no clear method and come back to it; rule out options before you guess.

Question palette colours

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Not answeredOpened, but no answer saved
AnsweredAnswer saved; it counts
Marked for reviewTo look at again; it does not count
Answered & marked for reviewTo look at again; the answer counts

Buttons

Save & Next: Saves the answer and opens the next question. On a section's last question it asks before moving to the next section.
Mark for Review & Next: Marks the question to look at again and moves on. If an option is chosen, that answer still counts.
Clear Response: Removes the chosen option.
A number in the palette: Opens that question, but does not save the answer on screen. To save, press “Save & Next”.

Questions10

Marks20

Time6 min

Per wrong answer−0.5

Default language for questions

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Sample questions with solutions

A few questions like the ones in this test, with the right answer and why.

Question 1
A college has 450 students, and 18% of them come by bus. How many students come by bus?
- 25
- 81Right answer
- 369
- 810
Explanation
1% of 450 = 4.5, so 18% = 18 × 4.5 = 81 students.
Check: 10% of 450 = 45 and 8% of 450 = 36, so 45 + 36 = 81.
Question 2
In a 75-question mock test, Arjun answered 57 questions correctly. What percent of the questions did he answer correctly?
- 24%
- 7.6%
- 76%Right answer
- 18%
Explanation
1% of 75 = 0.75, and 57 ÷ 0.75 = 76. So he answered 76% correctly.
Check: 76% of 75 = 57.
Question 3
In a ward election, 2,340 people voted. This was 65% of the registered voters. How many voters are registered?
- 1,521
- 3,600Right answer
- 3,861
- 36
Explanation
65% is 2,340, so 1% = 2,340 ÷ 65 = 36, and 100% = 36 × 100 = 3,600 voters.
Check: 65% of 3,600 = 2,340.
Question 4
Rakesh earns ₹24,000 a month. He pays 40% of it as rent, and then spends 25% of the remaining money on travel. How much money is left?
- ₹8,400
- ₹13,200
- ₹10,800Right answer
- ₹3,600
Explanation
Rent: 40% of 24,000 = 9,600, leaving 24,000 − 9,600 = 14,400.
Travel: 25% of 14,400 = 3,600, leaving 14,400 − 3,600 = 10,800.
Check: he keeps 75% of 60% of his pay, and 75% of 60% = 45%, and 45% of 24,000 = 10,800.
Question 5
In a school of 1,500 students, 60% are girls. 30% of the girls and 20% of the boys walk to school. What percent of all the students walk to school?
- 50%
- 25%
- 26%Right answer
- 18%
Explanation
Girls: 60% of 1,500 = 900, and 30% of 900 = 270 walk. Boys: 1,500 − 900 = 600, and 20% of 600 = 120 walk.
Walkers: 270 + 120 = 390, and 390 ÷ 1,500 × 100 = 26%.
Shortcut: 60% of 30% + 40% of 20% = 18% + 8% = 26%.