A - 140
B - 130
C - 120
D - 110
Q 2 - What per cent is 120 of 90?
A - 400/3%
B - 400/6%
C - 200/3%
D - 200/6%
Q 3 - What percent is 5gm of 1kg?
A - 0.15%
B - 0.05%
C - 0.25%
D - 0.35%
Q 4 - What per cent is 120 ml of 3.5 liters?
A - 30/7%
B - 20/7%
C - 10/7%
D - 1/7%
Q 5 - 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 - 50/3%
B - 60/3%
C - 70/3%
D - 80/3%
Q 6 - 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 - 10/3%
B - 100/3%
C - 20/3 %
D - 200/3 %
Q 7 - 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 - 50/3%
B - 100/3%
C - 20/3%
D - 200/3%
Q 8 - 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 - 100/9
B - 10/9
C - 100/3
D - 10/3
Q 9 - The tax on a commodity is diminished by 20% and its consumption increases by 15%.
A - 8% increase
B - 8% decrease
C - 10% decrease
D - 10% increase
Q 10 - 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 - 194481
B - 294481
C - 394481
D - 494481
Solution:
1.
Answer - A
Explanation
Let the number be x. 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.
2.
Answer - A
Explanation
Required % = (120/90*100)%= 400/3%
3.
Answer - B
Explanation
Required % = (5/1000*100)%= 1/2%=0.05%
4.
Answer - A
Explanation
Required % = (150/3500*100)%= 30/7%
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%
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%
7.
Answer - A
Explanation
Reduction % in consumption = {R/((100+R) )*100}%(20/120*100)%
= 50/3%
8.
Answer - A
Explanation
Increase % in consumption = {R/((100-R) )*100}% = {10/((100-10) )*100} = 100/9%
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%.
10.
Answer - A
Explanation
Population after 2 years = {176400 * (1+5/100)2 }
176400* 21/20*21/20=194481
