Directions(1-10): Find the approximate value of the following questions.
- 52.012% of 749.75 + 22.05 * ? = 874.07
1510252227Option D
52.012% of 749.75 + 22.05 * ? = 874.07
=>52% of 750 + 22*? = 874
=> 390 + 22*? = 874
=>? = 22 - 38.78^2 – 77.73*8.99 – 25.08*12.04 = ?
400500200300100Option B
38.78^2 – 77.73*8.99 – 25.08*12.04 = ?
=>40^2 – 80*10 – 25*12 = ?
=>1600 – 800 – 300 =?
=>? = 500 - 24.05*11.86 – 416.05/16.98 – 108.56 = ?
140152120133148Option B
24.05*11.86 – 416.05/16.98 – 108.56 = ?
=> 24*12 – 416/16 – 110 = ?
=>288 – 26 – 110 = ?
=>? = 152 - 22.25% of 29.69% of 48.12% of 4260 = 50.08% of ?
220245261258240Option D
22.25% of 29.69% of 48.12% of 4260 = 50.08% of ?
=>20% of 30% of 50% of 4300=50% of ?
=>? = 258 - (3100/124)*(8^3 /32) = ?^2
1030402050Option D
(3100/124)*(8^3 /32) = ?^2
=>?^2 = 25*(512/32)
=>?^2 = 25*16
=>? = 20 - At what rate of interest an amount of Rs.16000 will become Rs.25000 in 2 years if the rate is compounded annually.
27%22%25%15%20%Option C
25000 = 16000{1+r/100}^2
r = 25% - Five years ago, Rahul was 20 years elder than Raj. After 15 years, the ratio of their ages is 2:3. Find the average of their present ages.
32 years25 years20 years30 years35 yearsOption E
Let the present ages of Rahul and Raj be x and y resp.
x = y +20 —-(1)
And (y+15)/(x+15) = 2/3 —-(2)
On solving both the equations, we get
x = 45 years
y = 25 years
Average = 70/2 = 35 years - A shopkeeper marked his goods 60% above cost price and gave a discount of 25%. Find the profit percentage of shopkeeper.
30%25%20%15%10%Option C
Profit% = {(120-100)/100}*100 = 20% - A boat can cover 36 km upstream in 6 hours, and 84 km downstream in 7 hours. Find the ratio of speed of boat in still water to speed of stream.
3:42:53:14:13:2Option C
Required ratio =(12+6)/2 : (12-6)/2
= 3:1 - A 260 ml mixture contains water and acid in the ratio 6:7 resp. How much acid should be added to the mixture so that the ratio of water and acid changes to 3:5 resp.
30 ml60 ml20 ml50 ml40 mlOption B
Quantity of water = 120 ml
Quantity of acid = 140 ml
Now,
120/(140+x) = 3/5
=> x= 60 ml