Q. The sum of the digits of two digit number is 12..if new number formed by reversing the digits is greater than the original number by 54.what will be the original number?
Q. In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces.
2, 3, 5, 7, 11, x, 17
Q. Two trains running at x meters per second and y meters per second cross the same tunnel in a seconds and b seconds respectively. If the difference of lengths in the trains is m meters, then-Option
Option
A) m=xa - yb
B) 1/m=1/(xa) + 1/(yb)
C) m=xa + yb
D) m/(xa)=yb + 1Q
A shopkeeper has 13 washing machines out of which 5 are defective. A customer buys 3 washing machine. What is the probability that exactly one machine is defective?
(a) 1/20 (b) 1/5 (c) 70/143 (d) 35/143
Q. Koel score 49 marks in english, 37 marks in science, 45 marks in maths, 53 marks in hindi and 55 marks in social. The maximum marks a student can score in each subject is 70.how much approx percentage did Koel get in this exam?
Supriya runs a marathon race in 50 minutes at an average speed of 48 km/hrs . in order to set a national record she needs to win the race in 40 minutes considering that her speed remains constant at what minimum speed should she run to set the record?