Number System
- Find the maximum number of tree which can plant 20 m apart on the two side of straight road 1760 m long
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Number of trees that can be planted on one side of road = (1760 / 20) + 1
Correct Option: D
Number of trees that can be planted on one side of road = (1760 / 20) + 1
= 88 + 1
=89
∴ Trees on the both side = 2 x 89=178
- The least number among
4 , √ 9 , 0.45 and (0.8)2 is 9 49
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Decimal equivalents :
4 = 0.4; √ 9 = 3 = 0.43 9 49 7
0.45, (0.8)2 = 0.64Correct Option: B
Decimal equivalents :
4 = 0.4; √ 9 = 3 = 0.43 9 49 7
0.45, (0.8)2 = 0.64
∴ Least number = 0.43= √ 9 49
- The smallest number of five digits exactly divisible by 476 is
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The smallest number of 5 digits = 10000
Now,Correct Option: D
The smallest number of 5 digits = 10000
Now,
∴ Required number = 10000 + (476 – 4)
= 10000 + 472 = 10472
- The difference between two number is 18 if four times the second number is less then three what is the sum these two number?
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Let first number = P
And second number = Q
According to the question
P - Q = 10 ....(i)
And 3P - 4Q = 18...(ii)
on multiply eq (i) by 3 and then subtract eq (ii) from it
3P - 3Q = 54
3P - 4Q = 18
Q = 36
On putting the value of Q in the eq (i)
P = 18 + Q = 18 +36
⇒ P = 54Correct Option: D
Let first number = P
And second number = Q
According to the question
P - Q = 10 ....(i)
And 3P - 4Q = 18...(ii)
on multiply eq (i) by 3 and then subtract eq (ii) from it
3P - 3Q = 54
3P - 4Q = 18
Q = 36
On putting the value of Q in the eq (i)
P = 18 + Q = 18 +36
⇒ P = 54
Required sum = P + Q = 54 +36 =90
- The largest among the numbers
(0.1)2, √0.0121, 0.12 and √0.0004 is
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(0.1)2 = 0.01
√0.0121 = √0.11 × 0.11 = 0.11
√0.0004 = 0.02Correct Option: C
(0.1)2 = 0.01
√0.0121 = √0.11 × 0.11 = 0.11
√0.0004 = 0.02
After arranging the given numbers in increasing order, we will get
⇒0.01 < 0.02 < 0.11 < 0.12
So clearly 0.12 is the biggest fraction in the given question.