A┬а- 140
B┬а- 130
C┬а- 120
D┬а- 110
Q 2┬а- What per cent is 120 of 90?
A┬а- 400/3%
B┬а- 400/6%
C┬а- 200/3%
D┬а- 200/6%
Q 3┬а- What percent is 5gm of 1kg?
A┬а- 0.15%
B┬а- 0.05%
C┬а- 0.25%
D┬а- 0.35%
Q 4┬а- What per cent is 120 ml of 3.5 liters?
A┬а- 30/7%
B┬а- 20/7%
C┬а- 10/7%
D┬а- 1/7%
Q 5┬а- If A's pay is 20% more than that of B, then what number of per penny is B's compensation not as much as that of A?
A┬а- 50/3%
B┬а- 60/3%
C┬а- 70/3%
D┬а- 80/3%
Q 6┬а- If A's salary is 25% not as much as that of B, then what number of per penny is B's compensation more than that of A?
A┬а- 10/3%
B┬а- 100/3%
C┬а- 20/3 %
D┬а- 200/3 %
Q 7┬а- If the cost of tea is expanded by 20%, by what amount of percent must the utilization of tea be lessened so as not to build the consumption?
A┬а- 50/3%
B┬а- 100/3%
C┬а- 20/3%
D┬а- 200/3%
Q 8┬а- If the cost of sugar falls by 10%, by how much per penny should a householder expand its utilization, so as not to diminish its use on sugar?
A┬а- 100/9
B┬а- 10/9
C┬а- 100/3
D┬а- 10/3
Q 9┬а- The tax on a commodity is diminished by 20% and its consumption increases by 15%. Find the effect on revenue.
A┬а- 8% increase
B┬а- 8% decrease
C┬а- 10% decrease
D┬а- 10% increase
Q 10┬а- The population of a town is 176400. It increases annually at the rate of 5% p.a. What will be its population after 2 years?
A┬а- 194481
B┬а- 294481
C┬а- 394481
D┬а- 494481
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Solution:
1.
Answer - A
Explanation
Let the number be x.
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Then,(4/5 x)-(65% of x)= 21 => 4x/5-65x/100=21 => 4x/5-13x/20=21
=> 16x-13x=420 =>3x=420 ?x=140.
Required number = 140.
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2.
Answer - A
Explanation
Required % = (120/90*100)%= 400/3%
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3.
Answer - B
Explanation
Required % = (5/1000*100)%= 1/2%=0.05%
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4.
Answer - A
Explanation
Required % = (150/3500*100)%= 30/7%
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5.
Answer - A
Explanation
B's salary is less than that of A by is less than that of a by {R/((100+R) )*100}%
= {20/((120) )*100}% = 50/3%
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6.
Answer - B
Explanation
B's salary is more than that of A by {R/((100-R) )*100}%
= {25/((100-25) )*100}% = (25/75*100)=100/3%
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7.
Answer - A
Explanation
Reduction % in consumption = {R/((100+R) )*100}%(20/120*100)%
= 50/3%
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8.
Answer - A
Explanation
Increase % in consumption = {R/((100-R) )*100}% = {10/((100-10) )*100} = 100/9%
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9.
Answer - B
Explanation
Let originally revenue obtained by Rs. x.
New revenue = (Consumption * Tax)
= (115% of 80% of Rs. x) = Rs(115/100*80/100*x)=Rs.92x/100
= 92% of the original.
Hence, the revenue is decreased by 8%.
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10.
Answer - A
Explanation
Population after 2 years =┬а {176400 * (1+5/100)2 }
176400* 21/20*21/20=194481
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