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Use Referral Code: "S A H I L 1 0 " and Get Instant 10% Discount on "UNACADEMY SUBSCRIPTION"
1. What is the square root of 5041?
5041 का वर्गमूल क्या ह?ै
a) 79
b) 81
c) 71
d) 69
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
5041 = 71 × 71
𝟓𝟎𝟒𝟏 = 71
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2. Which of the numbers given below is the square root of 16384?
नीचे दी र्ई संख्याओं में 16384 का वर्गमूल ह?ै
a) 132
b) 128
c) 118
d) 122
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
16384 = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2
Square root of 16384 = 2 × 2 × 2 × 2 × 2 × 2 × 2
= 128
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3. What is the square root of 9409?
9409 का वर्गमूल क्या ह?ै
a) 83
b) 87
c) 89
d) 97
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
9409 = 97 × 97
√9409 = 97
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4. Square root of 0.9 is equal to:
0.9 का वर्गमूल बराबर ह:ै
a) 0.03
b) 0.3
c) 0.9487
d) 0.9463
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
0.9487 × 0.9487 ≈ 0.9
𝟎. 𝟗 = 0.9487
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5. The square root of 27225 is:
27225 का वर्गमूल ह:ै
a) 165
b) 155
c) 175
d) 145
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
27225 = 165 × 165
√27225 = 165
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6. Which of the numbers given below is the square root of 15376?
नीचे दी र्ई संख्याओं में से 15376 का वर्गमूल कौन सा ह?ै
a) 122
b) 124
c) 134
d) 128
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
15376 = 124 × 124
√15376 = 124
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7. 1.5625 = ?
(A) 1.05
(B) 1.25
(C) 1.45
(D) 1.55
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
1.5625 = 1.25 × 1.25
1.5625 = 1.25
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8. Number of digits in the square root of 82646281 is:
82646281 के वर्गमूल में अंकों की संख्या ह:ै
(A) 3
(B) 5
(C) 4
(D) 6
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
82646281 = 9091 × 9091
√82646281 = 9091
So, answer is 4.
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9. A group of students decided to collect as many paise from each member of the
group as is the number of members. If the total collection amounts to Rs. 75.69, the
number of the member is the group is:
छात्रों के एक समूह ने समहू के प्रत्यके सदस्य से उतने पसैे एकत्र करने का ननर्गय नलया नितना सदस्यों की
संख्या ह।ै यदद कुल संग्रह 75.69 रु ह,ै तो समूह में सदस्यों की संख्या ह:ै
(A) 57
(B) 67
(C) 77
(D) 87
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
Money collected = (75.69 x 100)
= 7569 paise
Number of members = √7569 = 87
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10. Which of the following numbers is not a perfect square ?
ननम्ननलनित में से कौन सी संख्या एक पूर्ग वर्ग नहीं ह?ै
a) 2916
b) 4489
c) 1024
d) 7840
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
‘2916’ is the square of 54.
‘4489’ is the square of 67.
‘1024’ is the square of 32.
‘7840’ is not a perfect square.
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11. What should come in place of both x in the equation𝑥
128=
162
𝑥
समीकरर्𝑥
128=
162
𝑥में दोनों x के स्थान पर क्या आना चानहए।
(A) 12
(B) 14
(C)
(D) 144196
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
𝑥
128=
162
𝑥
⇒ 𝑥² = 128 × 162
= 64 × 2 × 18 × 9= 8 × 6 × 3 = 144
x = √144 = 12
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12. 1.52 × 0.0225 =?
(A) 0.03755
(B) 0.3375
(C) 3.275
(D) 32.75
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
1.52 × 0.0225 = 2.25 × 0.15
= 0.3375
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13.625
11×
14
25×
11
196is equal to:
625
11×
14
25×
11
196बराबर ह:ै
(A) 5
(B) 6
(C) 8
(D) 11
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
625
11×
14
25×
11
196=
25
11×
14
5×
11
14
= 5
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14. Find is the value of 10 + 27 + 65 + 256
10 + 27 + 65 + 256 का मान ज्ञात कीनिए
(A) 9
(B) 8
(C) 6
(D) 4
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
10 + 27 + 65 + 256
= 10 + 27 + 65 + 16 = 10 + 27 + 9
= 10 + 6= 4
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15. 19.36 + 9 + ? 2 = 9.4
(A) 3.5
(B) 4.4
(C) 4
(D) 5
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
19.36 + 9 + ? 2 = 9.4
⇒ 4.4 + 9 + ? 2 = 9.4⇒ 9 + ? 2 = 25⇒ ? 2 = 16⇒ ? = 4
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16. 28 ? + 1426 =3
4𝑜𝑓 2984
(A) 729
(B) 784
(C) 841
(D) 961
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
28 ? + 1426 =3
4𝑜𝑓 2984
⇒ 28 ? = 2238 − 1426
⇒ ?=812
28= 29
⇒ ? = 29² = 841
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17. If 3 5 + 125 = 17.88, then what will be the value of 80 + 6 5 ?
यदद 3 5 + 125 = 17.88 ह,ै तो 80 + 6 5 का मान क्या होर्ा?
(A) 13.41
(B) 20.46
(C) 21.66
(D) 22.35
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
3 5 + 125 = 17.88
⇒ 3 5 + 5 5 = 17.88
⇒ 8 5 = 17.88
⇒ 5 = 2.235
√80 + 6√5 = 4 5 + 6 5
⇒ 10 5 = (10 x 2.235) = 22.35
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18. If √5 = 2.236, then the value of5
2−
10
5+ 125 is equal to:
यदद √5 = 2.236, तो5
2−
10
5+ 125 का मूल्य बराबर ह:ै
(A) 5.59
(B) 7.826
(C) 8.944
(D) 9.062
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
𝟓
𝟐−
𝟏𝟎
𝟓+ 𝟏𝟐𝟓 =
𝟓𝟐− 𝟐𝟎 + 𝟐 𝟓 × 𝟓 𝟓
𝟐 𝟓
=𝟑𝟓
𝟐 𝟓×
𝟓
𝟓
=𝟕 × 𝟐.𝟐𝟑𝟔
𝟐= 7.826
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19. A General wish to draw up his 36591 soldiers in the form of a solid square. After
arranging them, he found that some of them are leftover. How many are left?
एक िनरल अपने 36591 सनैनकों को एक ठोस वर्ग के रूप में व्यवनस्थत करना चाहता ह।ै उन्हें व्यवनस्थत
करने के बाद, उन्होंने पाया दक उनमें से कुछ बचे हुए हैं। दकतने बचे हैं?
(A) 72
(B) 81
(C) 100
(D) 110
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
Nearly perfect square is 191 × 191 = 36481
Remaining soldiers = 36591 – 36481 = 110
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20. Find the least number by which 5808 must be multiplied to make it a perfect
square.
छोटी से छोटी सखं्या ज्ञात करें निसके द्वारा 5808 को एक परू्ग वर्ग बनाने के नलए र्रु्ा दकया िाना
चानहए।
(A) 3
(B) 4
(C) 6
(D) 7
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
5808 = 2 × 2 × 2 × 2 × 3 × 11 × 11
So, we need to multiply by 3 to make
the number perfect square.
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21. Find the least number by which 1470 must be divided to get a number which is a
perfect square.
छोटी से छोटी सखं्या ज्ञात करें निसके द्वारा 1470 को नवभानित दकया िाना चानहए तादक प्राप्त सखं्या
एक पूर्ग वर्ग हो।
(A) 6
(B) 9
(C) 12
(D) 30
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
1470 = 7 × 7 × 5 × 6
we have to divide the number by 5 x 6 = 30, as
these factors are non-repetitive.
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22. Find the smallest number by which 1780 must be added to make the sum a
perfect square.
सबसे छोटी सखं्या ज्ञात कीनिए निसके द्वारा योर् को परू्ग वर्ग बनाने के नलए 1780 में िोडा िाना
चानहए।
(A) 46
(B) 49
(C) 69
(D) 72
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
42² < 1780 < 43²
1764 < 1780 < 1849
Hence, we have to subtract the given number
from 1849 to find the number to be added.
1849 – 1780 = 69
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23. The largest perfect square four-digit number is:
सबसे बडी चार अंकों की पूर्ग वर्ग संख्या ह:ै
(A) 9016
(B) 9801
(C) 9887
(D) None
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
9801 = 99 × 99
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24.0.324× 4.624
1.5625× 0.0289 × 64=?
(A) 0.64
(B) 0.70
(C) 0.72
(D) 0.54
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
0.324× 4.624
1.5625× 0.0289 × 64=
324× 4624 × 100
15625× 289 × 64
=18 × 68 ×10
125 × 17 × 8
= 0.72
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25. Largest five digit number which is perfect square is:
सबसे बडी पांच अंकीय संख्या िो दक पूर्ग वर्ग ह:ै
(A) 99225
(B) 99856
(C) 99596
(D) 99899
Math Foundation Course
SSC CGL Pre To Mains by Sahil Sir
99856 = 316 × 316
So, 99856 is the largest five digit number
which is perfect square