A number consists of 3 digits whose sum is 10. The middle digit is equal to the difference of the other two and the number will be increased by 99 if its digits are reversed. The square of the number is:
The population of rodents in a house doubles every day. Every day 25 rodents are killed. How many rodents are there if after every four days, the number of rodents becomes same again?
Lalu sold his watch and sunglasses at a loss of 5% and gain of 5% respectively for 3600 to Bhalu. Bhalu sold the same sun glasses and watch at a loss of 4% and gain of 4% respectively for 3800. The price of watch and sun glasses respectively to Lalu in rupees were.
Nirav took a loan of Rs. 201900 from PNB with simple interest for as many years as the rate of interest. If he was supposed to pay Rs. 395724 as interest at the end of the loan period, what was the rate of interest?
Rahmatullah could either walk or drive to office. The time taken to walk to the office is 11 times the driving time. One day, his wife took the car making him walk to office. After walking 2.5 km, he reached a temple when his wife called to say that he can now take the car. Ramanujam figured that continuing to walk to the office will take as long as walking back home and then driving to the office. Calculate the distance between the temple and the office in KMs.
Suppose the distance between his home and office is x km. Then, distance between his office and temple is (x – 2.5) km.
If he walks at a speed of y km/hr. Then his driving speed = 11y km/hour, as he is 11 times faster in car.
Then,
2.5/y + x/11y = (x – 2.5)/y
Or, 2.5 + x/11 = x – 2.5
or 10x/11 = 5
Or, x = 11/2
Finally, x – 2.5 = 11/2-5/2 = 6/2 = 3
Option 7)
P = 0.6 Q
Q= 0.25 R
So P = 0.6*0.25 R
R = 0.4 S
So, P = 0.6*0.5 * 0.4 S
S = 0.45*T
Again, P = 0.6* 0.5 * 0.4 * 0.45*T = 54/1000T
So P/T = 27/500
Option 8)
Isha’s grandfather was 5 times older to her 4 years ago. He would be three times of her age 8 years from now. 7 years ago, what was the ratio of Isha’s age to that of her grandfather’s age?
A father said to his son, "I was as old as you are at the present at the time of your birth". If the father's age is 55 years now, what would be the son's age 4.5 years later?
Let the sons current age be x
So fathers age x years back when son was born => 55-x = x
Solving we get x = 27.5
4.5 Years later son's age = 27.5 + 4.5 = 32 years
Jack enters a lift on the 25th floor, which is going up @ 56 floors/min speed. At the same time Jill enters another lift on the 70th floor which is going down @ 64 floors/min speed. At what floor will