Directions (Q. 1-3): In the following number series, only one number is wrong. Find out that number.
1. 2 36 150 393 810 1452 2366 (2)
1) 810
2) 393
3) 36
4) 2
5) 1452
2. 88 115 145 175 208 243 280 (3)
1) 88
2) 175
3) 145
4) 243
5) 280
3. 448 294 180 100 48 19 4 (5)
1) 4
2) 180
3) 294
4) 100
5) 19
4. Two trains are moving in opposite directions on parallel tracks at the speed of 48 kmph and 96 mph respectively. The first train passes a telegraph pole in 6 seconds whereas the second train passes the pole in 12 seconds. Find the time taken by the train to cross each other completely. (3)
1) 16 sec
2) 15 sec
3) 10 sec
4) 18 sec
5) None of these
5. The cost of carpeting a room 4m wide with a carpet at Rs. 4.50 per m2 is Rs. 180. The length of the room is (4)
1) 6 m
2) 4 m
3) 8 m
4) 10 m
5) None of these