The average age of five members of a family is 21 years. If the age of the grandfather be included, the average is increased by 9 years. The age of the grandfather is:
72yrs
66yrs
75yrs
80yrs
262.
Kiran got married 6 years ago. Today her age is 1 1/4 times her age at the time of marriage. Her son's age is son's age is: 1/10 times her age. Her sons age is :
2yrs
3yrs
4yrs
5yrs
263.
Ten years ago A was half of B in age. If the ratio of their present ages is 3: 4, what will be the total of their present ages?
8yrs
10yrs
33yrs
35yrs
264.
A father is twice as old as his son. 20 years ago, the age of the father was 12 times the age of the son. The present age of the father (in years) is:
44
29
45
56
265.
A train travels 225 km in 3.5 hours and 370 km in 5 hours. Find the average speed of train.
80 km/hr
60 km/hr
50 km/hr
70 km/hr
266.
A train 100 metres long passes a bridge at the rate of 72 km/hr in 25 seconds. What is the length of the bridge?
400m
170m
600m
none
267.
Compare the speed of two trains, one moving at the speed of 80 km/hr and the other at 10m/sec.
30:9
40:9
20:9
none of all above
268.
What is the greater of two numbers whose product is 900, if the sum of the two numbers exceeds their difference by 30?
15
60
75
90
269.
As a fund-raiser, the school band was selling two types of candy: lollipops for 40 cents each and chocolate bars for 75 cents each. One Monday, they sold 150 candies and raised 74 dollars. How many lollipops did they sell?
75
90
96
110
270.
A jar contains only red, white, and blue marbles. The number of red marbles is 4/5 the number of white ones, and the number of white ones is 3/4 the number of blue ones. If there are 470 marbles in all, how many of them are blue?