Directions (1-5): What should come in place of question mark (?) in the following number series?
1. 51975 9450 2100 600 240 160 ?
Ans: 320
2. 6 26 134 666 3334 16666 ?
Ans: 83344
3. 8000 1600 320 64 12.8 ?
Ans: 2.56
4. 499 622 868 1237 1729 2344 ?
Ans: 3082
5. 16 17 25 52 116 241 ?
Ans: 476
6. In how many ways can the word, “PACERS” be arranged so that each word begins with ‘P’ and ends with ‘R’?
Ans: 24
7. If 2 balls are drawn one after another from a bag containing 3 white and 5 red balls, then what is the probability that the first ball is white and second is red?
Ans: 15/56
8. A can run 330 meters in 41 sec. and B in 44 sec. By how many sec. will B win if he has 30 meters start ?
Ans: 1
1. 51975 9450 2100 600 240 160 ?
Ans: 320
2. 6 26 134 666 3334 16666 ?
Ans: 83344
3. 8000 1600 320 64 12.8 ?
Ans: 2.56
4. 499 622 868 1237 1729 2344 ?
Ans: 3082
5. 16 17 25 52 116 241 ?
Ans: 476
6. In how many ways can the word, “PACERS” be arranged so that each word begins with ‘P’ and ends with ‘R’?
Ans: 24
7. If 2 balls are drawn one after another from a bag containing 3 white and 5 red balls, then what is the probability that the first ball is white and second is red?
Ans: 15/56
8. A can run 330 meters in 41 sec. and B in 44 sec. By how many sec. will B win if he has 30 meters start ?
Ans: 1