SSC CGL Quant – Calculation Speed – Level 3 · Challenge
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(37 + 13)² = 50² = 2,500.
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SSC CGL Quant – Calculation Speed – Level 3 · Challenge – 8 questions, subject: Quantitative Aptitude. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.
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1.
What is the unit digit of 3⁶⁵ + 7⁶⁵?
Correct Answer: D [0]
Explanation:
65 ÷ 4 leaves 1 → 3 and 7; 3 + 7 = 10 → 0.
2.
11² + 12² + 13² + … + 20² = ?
Correct Answer: A [2,485]
Explanation:
Sum 1²…20² = 2,870; minus 1²…10² = 385 → 2,485.
3.
Assertion–Reason
A: No perfect square ends in the digit 7.
R: Squares of 0 to 9 end only in 0, 1, 4, 5, 6 or 9.
A: No perfect square ends in the digit 7.
R: Squares of 0 to 9 end only in 0, 1, 4, 5, 6 or 9.
Correct Answer: A [Both A and R are true and R explains A]
Explanation:
The last digit of a square depends only on the last digit of the number, so R gives A.
4.
What is the least number that must be added to 7,850 to make it divisible by 11?
Correct Answer: C [4]
Explanation:
7,850 = 11 × 713 + 7, so add 11 − 7 = 4.
5.
The largest 4-digit number divisible by both 8 and 9 is:
Correct Answer: D [9,936]
Explanation:
Divisible by 72; 9,999 = 72 × 138 + 63 → 9,999 − 63 = 9,936.
6.
How many of the squares 1², 2², …, 50² end in the digit 6?
Correct Answer: B [10]
Explanation:
n must end in 4 or 6: 4, 6, 14, 16, …, 44, 46 → 10.
7.
1.5² + 2.5² + 3.5² = ?
Correct Answer: B [20.75]
Explanation:
2.25 + 6.25 + 12.25 = 20.75 (Five-Tail with the point placed).
8.
37 × 37 + 2 × 37 × 13 + 13 × 13 = ?
Correct Answer: D [2,500]
Explanation:
(37 + 13)² = 50² = 2,500.
➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 Quantitative Aptitude book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-quantitative-aptitude
📘 TNPSC திறனறிவும் மனக்கணக்கு நுண்ணறிவும் (Aptitude & Mental Ability) – முழுமையான பாடநூல்
Here you get the answer with a one-line explanation. TNPSC திறனறிவு & காரணவியல் சிலபஸ் முழுவதும் · 14 அத்தியாயங்கள் + 2 அலகு மாதிரித் தேர்வுகள் · 357 பயிற்சி வினாக்கள் படிப்படியான தீர்வுடன் · மாதிரித் தாள்கள் (50 வினாக்கள்) · 14 மனவரைபடங்கள் · சூத்திரச் சுருக்கம், கணக்கு அட்டவணைகள்
Get the book – ₹199 More quizzes
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