Ques:- 252 can be expressed as a product of primes as
A. 2 x 2 x 2 x 3 x 7
B. 2 x 2 x 3 x 3 x 7
C. 2 x 3 x 3 x 3 x 7
D. 3 x 3 x 3 x 3 x 7
Ques:- The positions of the first and the fifth digit in the number 93264187 are interchanged. Similarly, the positions of the second and the sixth digits are inter changed and so on. Which of the following will be the third digit from the right end after the rearrangement?
A. 8
B. 3
C. 2
D. 6
E. None of these
Ques:- A train 280 m long is moving at 60 km/hr. Time taken by the train to cross a tunnel 220 m long is
A. 15 sec
B. 20 sec
C. 25 sec
D. 30 sec