दशमलव संख्या से संबंधित प्रश्न DECIMAL NUMBER MCQ
Q.1
34.67 + 78.9 = ?
A. 11.357
B. 1.1357
C. 113.57
D. 1135.7
हल:- प्रश्नानुसार,
34.67 + 78.9 = ?
? = 113.57
Ans. 113.57
Q.2
8734.87 + 678.98 = ?
A. 9,413.85
B. 9,41.385
C. 9,4138.5
D. 9,41.385
हल:- प्रश्नानुसार,
8734.87 + 678.98 = ?
? = 9,413.85
Ans. 9,413.85
Q.3
6567.987 + 67798.347 + 8767.87 = ?
A. 83,1342.04
B. 83,13.4204
C. 83,13420.4
D. 83,134.204
हल:- प्रश्नानुसार,
6567.987 + 67798.347 + 8767.87 = ?
? = 83,134.204
Ans. 83,134.204
Q.4
9877.54 + 57.978 – 3467.98 = ?
A. 6,46753.8
B. 6,467.538
C. 6,46.7538
D. 6,4675.38
हल:- प्रश्नानुसार,
9877.54 + 57.978 – 3467.98 = ?
9,935.518 – 3467.98 = ?
? = 6,467.538
Ans. 6,467.538
Q.5
5677.34 + 6657.87 – 3.766 = ?
A. 12,33144.4
B. 12,3314.44
C. 12,331.444
D. 12,33.1444
हल:- प्रश्नानुसार,
5677.34 + 6657.87 – 3.766 = ?
12,335.21 – 3.766 = ?
? = 12,331.444
Ans. 12,331.444
Q.6
677.987 + 87.98 – 548.9 = ?
A. 217.067
B. 21706.7
C. 2170.67
D. 21.7067
हल:- प्रश्नानुसार,
677.987 + 87.98 – 548.9 = ?
765.967 – 548.9 = ?
? = 217.067
Ans. 217.067
Q.7
5655.77 + 7669.98 = ?
A. 13,3257.5
B. 13,325.75
C. 13,32.575
D. 13,3.2575
हल:- प्रश्नानुसार,
5655.77 + 7669.98 = ?
? = 13,325.75
Ans. 13,325.75
Q.8
4567.98 + 876.98 – 7687.98 – 3465.87 = ?
A. 5,708.89
B. -5,708.89
C. -57.0889
D. 57088.90
हल:- प्रश्नानुसार,
4567.98 + 876.98 – 7687.98 – 3465.87 = ?
5,444.96 – (7687.98 + 3465.87) = ?
5,444.96 – 11,153.85 = ?
? = -5,708.89
Ans. -5,708.89
Q.9
5678.87 + 657.93 – 324.54 – 124.87 = ?
A. 4,766.12
B. 61.3713
C. 6,137.13
D. 8,988.12
हल:- प्रश्नानुसार,
678.87 + 657.93 – 324.54 – 124.87 = ?
6,336.8 – (324.54 + 124.87) = ?
6,336.8 – 199.67 = ?
? = 6,137.13
Ans. 6,137.13
Q.10
(2.3)³ – 0.027/(2.3)² + 0.69 + 0.09 = ?
A. 0
B. 1
C. 2
D. 4
हल:- प्रश्नानुसार,
(2.3)³ – 0.027/(2.3)² + 0.69 + 0.09 = ?
(a³ – b³)/a² + ab + b²
(a – b)(a² + ab + b²)/a² + ab + b²
(a – b)
(2.3 – 0.3)
2
Ans. 2
Q.11
1376.23 – ? = 841.474 – 149.031
A. 685.787
B. 785.767
C. 681.387
D. 683.787
हल:- प्रश्नानुसार,
1376.23 – ? = 841.474 – 149.031
1376.23 + 149.031 – 841.474
1525.261 – 841.474
Ans. 683.787
Q.12
25.0025/0.025 किसके बराबर हैं?
A. 1.01
B. 10.1
C. 101
D. 1001
हल:- प्रश्नानुसार,
25.0025/0.025
250025000/250000
1001/100
Ans. 10.1
Q.13
0.05 × 0.09 × 5 = ?
A. 0.005
B. 0.0225
C. 0.025
D. 0.225
हल:- प्रश्नानुसार,
0.05 × 0.09 × 5
0.0225
Ans. 0.0225
Q.14
1 × 0.1 × 0.01 × 0.001 का मान हैं?
A. 0.00001
B. 1.00001
C. 0.000001
D. 1.1
हल:- प्रश्नानुसार,
1 × 0.1 × 0.01 × 0.001
0.000001
Ans. 0.000001
Q.15
2 × 0.02 × 0.002 = ?
A. 0.00008
B. 0.000008
C. 0.0008
D. 0.008
हल:- प्रश्नानुसार,
2 × 0.02 × 0.002 = ?
2 × 0.00004
Ans. 0.00008
Q.16
0.02 + 0.1 + 0.121 का मान हैं?
A. .024
B. 0.204
C. 0.042
D. 0.241
हल:- प्रश्नानुसार,
0.02 + 0.1 + 0.121
Ans. 0.241
Q.17
8 + 7.9 – [2.1 – 6.3 – (2.1 + 0.9) + 15.2] = ?
A. 2.1
B. 6.3
C. 7.9
D. 8.0
हल:- प्रश्नानुसार,
8 + 7.9 – [2.1 – 6.3 – (2.1 + 0.9) + 15.2] = ?
8 + 7.9 – [2.1 – 6.3 – 3.0 + 15.2]
15.9 – 8.0
Ans. 7.9
Q.18
0.2 + 0.2 – 0.2 ÷ 0.2 × (0.2 × 0.2) को सरल करने पर प्राप्त होगा?
A. 0.04
B. 0.36
C. 0.2
D. 1
हल:- प्रश्नानुसार,
0.2 + 0.2 – 0.2 ÷ 0.2 × (0.2 × 0.2)
0.2 + 0.2 – 0.2 ÷ 0.2 × 0.04
0.2 + 0.2 – 0.2 × 1/0.2 × 0.04
0.2 + 0.2 – 0.04
0.4 – 0.04
Ans. 0.36
Q.19
2.002 + 7.9 [2.8 – 6.3 (3.6 – 1.5) + 15.6] = ?
A. 2.002
B. 4.2845
C. 40.843
D. 42.845
हल:- प्रश्ननानुसार,
2.002 + 7.9 [2.8 – 6.3 (3.6 – 1.5) + 15.6] = ?
= 2.002 + 7.9 [2.8 – 6.3 × 2.1 + 15.6]
= 2.002 + 7.9 [2.8 – 13.23 + 15.6]
= 2.002 + 7.9 × 5.17
= 2.002 + 40.843
Ans. 42.845
Q.20
432.4 + 53.6 ÷ 6.7 = ?
A. 438.4
B. 441.4
C. 440.4
D. 439.7
हल:- प्रश्ननानुसार,
432.4 + 53.6 ÷ 6.7 = ?
432.4 + 53.6 × 1/6.7 = ?
432.4 + 8
Ans. 440.40
Q.21
50/0.2 ÷ 0.5/5 = ?
A. 2500
B. 250
C. 5000
D. 350
हल:- प्रश्ननानुसार,
50/0.2 ÷ 0.5/5 = ?
500/2 ÷ 5/50
250 ÷ 1/10
250 × 10
Ans. 2500
Q.22
सरल करने पर 1/0.04 का मान हैं?
A. 5/2
B. 25
C. 2/5
D. 1/40
हल:- 1/0.04
100/4
Ans. 25
Q.23
5400 ÷ 0.9 ÷ 0.3 = ?
A. 0.0002
B. 20000
C. 0.02
D. 2.002
हल:- प्रश्नानुसार,
5400 ÷ 0.9 ÷ 0.3 = ?
5400 × 1/0.9 × 1/0.3
5400/0.27
540000/27
Ans. 20000
Q.24
6.5 ÷ 0.0005 = ?
A. 1300
B. 0.0013
C. 130
D. 13000
हल:- प्रश्नानुसार,
6.5 ÷ 0.0005 = ?
6.5/0.0005 = ?
(6.5 × 10000)/5 = ?
Ans. 13000
Q.25
22.22222 ÷ 50 = ?
A. 0.444444
B. 0.4444444
C. 0.44444
D. 0.04444444
हल:- प्रश्नानुसार,
22.22222 ÷ 50 = ?
22.22222/50 = ?
0.4444444 = ?
Ans. 0.4444444
Q.26
70.007 ÷ 0.07 = ? × 10
A. 10.01
B. 1000.1
C. 100.01
D. 100.1
हल:- प्रश्नानुसार,
70.007 ÷ 0.07 = ? × 10
70.007 × 1/0.07 = ? × 10
70007/1000 × 100/7 × 1/10 = ?
1001/100 = ?
Ans. 10.01
Q.27
√(0.081 × 0.484)/(0.0064 × 6.25)
A. 0.9
B. 0.99
C. 9
D. 99
हल:- प्रश्नानुसार,
√(0.081 × 0.484)/(0.0064 × 6.25)
√(81 × 484)/(64 × 625)
(9 × 22)/(8 × 25)
198/200
Ans. 0.99
Q.28
साधारण भिन्न 105/100 किस दशमलव भिन्न के बराबर हैं?
A. 1.005
B. 1.05
C. 0.15
D. 1.5
हल:- प्रश्नानुसार,
105/100
1.05
Ans. 1.05
Q.29
10.5 का 2/3, 10.05 का 3/5 से कितना अधिक हैं?
A. 0.97
B. 0.7
C. 0.7
D. 0.87
हल:- प्रश्नानुसार,
10.5 × 2/3 – 3/5 × 10.05
7 – 603
Ans. 0.97
Q.30
यदि √15 = 3.87 हो तो √5/3 बराबर हैं?
A. 0.43
B. 1.63
C. 1.89
D. 1.29
हल:- प्रश्नानुसार,
√5/3 = √(5 × 3)/(3 × 3)
= √15/9
√15 = 3.87 (दिया हैं)
= 3.87/3
= 387/300
Ans. 1.29
Q.31
(2.5)² – (1.5)² / 2.5 + 1.5 = ?
A. 0
B. 1
C. 2
D. 3
हल:- प्रश्नानुसार,
a² – b² / (a – b)
(a – b)(a + b)/(a + b)
(a – b)
(2.5 – 1.5)
Ans. 1
Q.32
(7.84 × 7.84 – 2.16 × 2.16) / (7.84 – 2.16) ÷ 0.5
A. 4
B. 5
C. 6
D. 20
हल:- प्रश्नानुसार,
(7.84 × 7.84 – 2.16 × 2.16) / (7.84 – 2.16) ÷ 0.5
(a² – b²) / (a – b)
(a – b)(a + b)/(a – b)
(a + b)
(7.84 + 2.16) ÷ 0.5
10 × 1/0.5
10 × 10/5
Ans. 20
Q.33
(5.4 × 5.4 – 3.6 × 3.6) / (5.4 + 3.6) = ?
A. 5.4
B. 1.8
C. 3.6
D. 9.00
हल:- प्रश्नानुसार,
(5.4 × 5.4 – 3.6 × 3.6) / (5.4 + 3.6) = ?
व्यंजक = (a² – b²) / (a + b)
(a + b)(a – b)/(a + b)
(a – b)
(5.4 – 3.6)
Ans. 1.8
Q.34
(67.542 + 32.458)(67.542 – 32.458) / (75.458 – 40.364) = ?
A. 100
B. 0.01
C. 0.100
D. 1.000
हल:- प्रश्नानुसार,
(67.542 + 32.458)(67.542 – 32.458) / (75.458 – 40.364)
(100 × 35.084)/35.084
Ans. 100
Q.35
(0.25 × 0.25 – 0.24 × 0.24)/0.49 का मान हैं?
A. 0.01
B. 0.49
C. 0.001
D. 0.08
हल:- प्रश्नानुसार,
(0.25 × 0.25 – 0.24 × 0.24)/0.49
व्यंजक = (a² – b²) / (a + b)
(a – b)(a + b) / (a + b)
(a – b)
(0.25 – 0.24)
Ans. 0.01
Q.36
(0.5)³ + (0.6)³ / (0.5)² – (0.3) + (0.6)² का मान हैं?
A. 0.11
B. 3.3
C. 1.1
D. 0.33
हल:- प्रश्नानुसार,
(0.5)³ + (0.6)³ / (0.5)² – (0.3) + (0.6)²
व्यजंक = (a² + b²) / (a² – ab + b²)
= (a + b)
a = 0.5, b = 0.6
(0.5 + 0.6)
Ans. 1.1
Q.37
22.2222 ÷ 50 = ?
A. 0.4444444
B. 0.55444
C. 0.09999
D. 0.008999
हल:- प्रश्नानुसार,
22.2222 ÷ 50 = ?
222222/10000 × 1/50 = ?
? = 0.4444444
Ans. 0.44444444
Q.38
0.939 ÷ 9.39 ÷ 0.001 = ?
A. 0.1
B. 10
C. 100
D. 1000
हल:- प्रश्नानुसार,
0.939 ÷ 9.39 ÷ 0.001 = ?
0.939 × 1/9.39 × 1/0.001 = ?
939/1000 × 100/939 × 1000/1 = ?
? = 100
Ans. 100
Q.39
6.5 ÷ 0.0005 = ?
A. 1300
B. 0.0013
C. 130
D. 13000
हल:- प्रश्नानुसार,
6.5 ÷ 0.0005 = ?
6.5/0.0005 = ?
(6.5 × 10000)/5 = ?
? = 13000
Ans. 13000
Q.40
567.87 ÷ 0.0016 = ?
A. 1300
B. 0.0013
C. 130
D. 13000
हल:- प्रश्नानुसार,
567.87 ÷ 0.0016 = ?
567.87/0.0016 = ?
(567.87 × 10000)/16 = ?
? = 567,870/16
Ans. 354,91.875
Q.41
यदि a = 4.965, b = 2.343 और c = 2.622 हो, तो a³ – b³ – c³ – 3abc का मान हैं?
A. 0
B. 1
C. 2
D. 4
हल:- प्रश्नानुसार,
a³ + (-b)³ + (-c)³ – 3abc
(a – b – c)(a³ + b³ + c³ + ab – bc + ca)
(a – b – c) = (4.965 – 2.343 – 2.622)
2.622 – 2.622 = 0
a³ – b³ – c³ – 3abc = 0
Ans. 0
Q.42
(0.98)³ + (0.02)³ + 3 × 0.98 × 0.02 – 1 का मान हैं?
A. 0
B. 1
C. 2
D. 4
हल:- प्रश्नानुसार,
(0.98)³ + (0.02)³ + 3 × 0.98 × 0.02 – 1
(0.98)³ + (0.02)³ + 3 × 0.98 × 0.02 (0.98 + 0.02) – 1
(0.98 + 0.02)³ – 1
1³ – 1
1 – 1
0
Ans. 0
Q.43
(2.3)³ – 3(2.3)² × (0.3) + 3 (2.3)(0.09) – (0.3)³ का मान होगा?
A. 2
B. 4
C. 6
D. 8
हल:- प्रश्नानुसार,
(2.3)³ – 3(2.3)² × (0.3) + 3 (2.3)(0.09) – (0.3)³
व्यंजक ⇒ a³- 3a²b + 3ab² – b = (a – b)³
= (a – b)³
= (2.3 – 0.3)³
= 2³
= 8
Ans. 8
Q.44
यदि √4096 = 64 हैं तो √40.96 + √0.4096 + √0.004096 + √0.00004096 का दो दशमलव स्थानों तक मान हैं?
A. 71.1
B. 7.11
C. 0.711
D. 711.0
हल:- प्रश्नानुसार,
√4096 = 64
√40.96 + √0.4096 + √0.004096 + √0.00004096
= 6.4 + 0.64 + 0.064 + 0.0064
= 7.1104
= 7.11
Ans. 7.11
Q.45
यदि √1936 = 44 हैं तो √19.36 + √0.1936 + √0.001936 + √0.00001936 का दशमलव के दो स्थानों तक मान हैं?
A. 4.89
B. 48.9
C. 489.0
D. 0.489
हल:- प्रश्नानुसार,
√1936 = 44
= √19.36 + √0.1936 + √0.001936 + √0.00001936
= 4.4 + 0.44 + 0.044 + 0.0044
= 4.8884
= 4.89
Ans. 4.89
Q.46
यदि √2916 = 54 हो तो √29.16 + √0.2916 + √0.002916 + √0.00002916 का मान होगा?
A. 6.9649
B. 5.9994
C. 59.994
D. 69.995
हल:- प्रश्नानुसार,
√29.16 + √0.2916 + √0.002916 + √0.00002916
दिया हैं – √2916 = 54
5.4 + 0.54 + 0.054 + 0.0054
Ans. 5.9994
Q.47
1/1×2 + 1/2×4 + 1/2×4×6 का मान दशमलव के तीन अंकों तक क्या हैं?
A. 0.6458
B. 0.4335
C. 0.5678
D. 0.4326
हल:- प्रश्नानुसार,
1/1×2 + 1/2×4 + 1/2×4×6
1/2 + 1/8 × 1/48
0.5000 + 0.1250 + 0.0208
0.6458
Ans. 0.6458
Q.48
यदि (17.28 × x)/(3.6 × 0.2) = 2 हो, तो x का मान हैं?
A. ½
B. ⅔
C. ⅞
D. 1⁄12
हल:- प्रश्नानुसार,
(17.28 × x)/(3.6 × 0.2) = 2
(17.28 × x) = 2 × (3.6 × 0.2)
x = 2 × (3.6 × 0.2)/17.28
x = 1⁄12
Ans. 1⁄12
Q.49
⅖(4555.56) + 168.98
A. 1,991.204
B. 1,991.302
C. 1,991.111
D. 1,991.208
हल:- प्रश्नानुसार,
⅖ (4555.56) + 168.98
⅖ × (4555.56) + 168.98
9,111.12/5 + 168.98
1,822.224 + 168.98
Ans. 1,991.204
Q.50
√(0.1)² + (0.01)² + (0.009)²/(0.01)² + (0.001)² + (0.0009)² का मान हैं?
A. 00.1
B. 0.01
C. 10²
D. 10
हल:- प्रश्नानुसार,
√(10)² (0.10)² + (0.001)² + (0.0009)²/(0.01)² + (0.001)² + (0.0009)²
√(10)²
√100
10
Ans. 10