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Friday, 7 August 2015

Percentage Quiz for IBPS CWE

1. A number increased by 137 ½ % and the increment is 33. The number is
1) 27  2) 22  3) 24  4) 25  5) None of these
Solution: (3).
Let the number be x.
Then, 137.5% of x = 33
Therefore x = (33 x 100) /137.50
= 24

2. A’s salary is 20% less than B’s salary. Then B’s salary is more than A’s salary by
1) 33 ½ %  2) 16 2/3 %  3) 20%  4) 25%  5) None of these
Solution: (4).
Given, a = 20%
Required percentage = a / (100 – a) X 100%
= 20 / (100-20) X 100%
= 20/80 X 100% = 25%

3. If the price of petrol is increased by 20%, by what percentage should the consumption be
decreased by the consumer, if the expenditure on petrol remains unchanged?
1) 16 2/3 %  2) 6 2/3%  3) 8%  4) 15%  5) None of these
Solution: (1).
Here , a = 20%
Required percentage loss = a /(100 + a) X 100%
= 20 / (100+20) X 100%
= 20/120 x 100% = 16 2/3%

4. A water pipe is cut into two pieces. The longer piece is 70% of the length of the pipe. By how much
percentage is the longer piece longer than the shorter piece?
1) 140%  2) 400/3 %  3) 40%  4) All of the these  5) None of these
Solution: (2).
Increase in percentage of longer pipe compared to shorter pipe
= 70 - 30 / 30 X 100%
= 40/30 X 100% = 400/3 %.

5. A man losses 20% of his money. After spending 25% of the remainder, he has Rs.480 left. What is
the amount of money he originally had?
1) Rs.600  2) Rs.720  3) Rs.800  4) Rs.840  5) None of these
Solution: (3).
Let a man have Rs.x
Remainder money, after losses 20% of his money
= x – 20% of x =x – (x x20)/100
= 5x – x / 5
= 4x/5
Remainder money, after spending 25% of his remainder money = 4x/5 – 25% of (4x /5)
= 4x/5 - (4x/5 X 25/100)
= 4x/5 - x/5 = 4x-x / 5
=3x/5
According to the question,
3x/5 =480
x = 480 X 5 /3
= Rs.800
Also Read :
Current Affairs Android App
IBPS RRB 2015 Notification
RBI Assistant recruitment 2015





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