적성-소수 및 분수 풀이 예
Q 1- 다음 중 0.36의 분수는 무엇입니까?
A -9/25
B -51/25
C -3/400
D -2081/250
Answer - A
Explanation
0.36 = 36/100 = 9/25Q 2-2.04의 분수는 다음 중 무엇입니까?
A -9/25
B -51/25
C -3/400
D -2081/250
Answer - B
Explanation
2.04 = 204/100 = 51/25Q 3- 다음 중 .0075의 분수는 무엇입니까?
A -9/25
B -51/25
C -3/400
D -2081/250
Answer - C
Explanation
.0075 = 75/10000 = 3/400Q 4-8.324의 분수는 다음 중 무엇입니까?
A -9/25
B -51/25
C -3/400
D -2081/250
Answer - D
Explanation
8.324 = 8324/1000 = 2081/250.Q 5- 다음 중 3/8, 7/12, 2/3, 16/25, 14/15에 대한 올바른 오름차순은 무엇입니까?
A -3/8 <7/12 <2/3 <16/25 <14/15
B -3/8 <7/12 <16/25 <2/3 <14/15
C -7/12 <3/8 <2/3 <16/25 <14/15
D -2/3 <7/12 <3/8 <16/25 <14/15
Answer - B
Explanation
3/8 = 0.375, 7/12 = 0.583, 2/3 = 0.666, 16/25 = 0.64 and 14/15 = 0.933
As .375 < .583 < .64 <.666 < .933
∴ 3/8 < 7/12 < 2/3 < 16/25 < 14/15Q 6- 다음 중 3/5, 4/7, 8/9, 9/11, 13/15의 올바른 내림차순은 무엇입니까?
A -3/5> 4/7> 8/9> 9/11> 13/15
B -8/9> 13/15> 9/11> 3/5> 4/7
C - 13/15> 8/9> 9/11> 3/5> 4/7
D -13/15> 8/9> 3/5> 9/11> 4/7
Answer - B
Explanation
3/5 = 0.6, 4/7 = 0.571, 8/9 = 0.888, 9/11 = 0.818, 13/15 = 0.866
As 0.888 > 0.866 > 0.818 > 0.6 > 0.571
∴ 8/9 > 13/15 > 9/11 > 3/5 > 4/7Q 7-1.5, 3, 0.6의 HCF는 다음 중 무엇입니까?
A -0.3
B -0.1
C -0.2
D -0.6
Answer - A
Explanation
Make same numbers of decimal places in the given numbers.
Numbers become 1.5, 3.0 and 0.6
Without decimal places, these numbers are 15, 30 and 6.
H.C.F. of 15, 30 and 6 = 3
∴ H.C.F. of given numbers = 0.3Q 8- 다음 중 1.5, 3 및 0.6의 LCM은 무엇입니까?
A -3
B -2
C -1
D -6
Answer - A
Explanation
Make same numbers of decimal places in the given numbers.
Numbers become 1.5, 3.0 and 0.6
Without decimal places, these numbers are 15, 30 and 6.
L.C.M. of 15, 30 and 6 = 30
∴ l.C.M. of given numbers = 3Q 9-34.64 + 2.9 + 107.035 + .0086 =?
A -141.5436
B -144.5836
C - 134.5678
D -132.8765
Answer - B
Explanation
We have
34.64
2.9
107.035
.0086
---------
144.5836
---------
∴ 34.64 + 2.9 + 107.035 + .0086 = 144.5836질문 10-3.004-1.2996 =?
A -1.7044
B -0.7262
C - 1.6723
D -0.3456
Answer - A
Explanation
We have
3.004
-1.2996
-------
1.7044
-------
∴ 3.004 - 1.2996 = 1.7044Q 11-6.2958을 10에서 뺀 결과는 다음 중 무엇입니까?
A -3.7042
B -3.8675
C -2.8762
D -3.8762
Answer - A
Explanation
We have
10.0000
- 6.2958
-------
3.7042
-------
∴ 10 - 6.2958 = 3.7042Q 12-1.71 x 1.3 =?
A -3.213
B -2.223
C -1.223
D -3.213
Answer - B
Explanation
171 x 13 = 2223
Here sum of decimal places = 2 + 1 = 3
∴ 1.71 x 1.3 = 2.223Q 13-3.746 x 11.4 =?
A -42.7044
B -40.7654
C - 34.8762
D -42.7862
Answer - A
Explanation
3746
x114
------
14984
3746x
3746xx
-------
427044
-------
Here sum of decimal places = 3 + 3 = 6
∴ 3.746 x 11.4 = 42.7044Q 14 -.5 x 0.5 x .005 x 50 =?
A -.00625
B -.0625
C -.625
D -6.25
Answer - A
Explanation
We have 5 x 5 x 5 x 50 = 6250
Sum of decimal places = 1 + 2 + 3 = 6
∴ .5 x 0.5 x .005 x 50 = 0.00625.Q 15-172 x 38 = 6536이면 1.72 x 0.38은 무엇입니까?
A -65.36
B -0.06536
C - 0.6536
D -6.536
Answer - B
Explanation
Sum of decimal places = 2 + 3 = 5
∴ 1.72 x 0.38 = 0.06536.Q 16-0.0182 / 14 =?
A -13
B -0.013
C - 0.0013
D -1.3
Answer - C
Explanation
182 / 14 = 13
Dividend contains 4 places of decimals.
∴ 0.0182 / 14 = 0.0013Q 17-40.40 / 0.0008 =?.
A -50.5
B -505
C - 5050
D -50500
Answer - D
Explanation
40.40 / 0.0008 = (40.40 x 10000)/(8 x 10000) = 404000/8 = 50500Q 18-0.001 /? = 0.1
A -0.1
B -0.01
C - 0.001
D -1.0
Answer - B
Explanation
Let 0.001/x = 0.1
=> x = (0.001/0.1)x (10/10) = .01/1 = .01Q 19-0.313131의 분수는 무엇입니까?
A -3/7
B -4/9
C -3/9
D -99/31
Answer - B
Explanation
=0.313131 = 31/99Q 20-0.5366666의 분수는 무엇입니까?
A -61/300
B -69/550
C - 300분의 161
D -8/45
Answer - C
Explanation
0.5366666 = (536 - 53)/900 = 483/900 = 161/300.