Directions (Q. 1-5): What should come in place of question mark (?) in the following number series?

1. 18 99 682 5443 ?

1) 48972 2) 48963 3) 48957 4) 48948 5) 48682

2. 1324 1721 2190 2737 3368 ?

1) 3986 2) 4089 3) 4136 4) 4290 5) 4068

3. 363 234 141 78 39 18 ?

1) 12 2) 11 3) 10 4) 9 5) 8

4. 665 463 307 191 109 ?

1) 79 2) 69 3) 55 4) 51 5) 47

5. 210 336 504 720 990 1320 ?

1) 1651 2) 1688 3) 1716 4) 1794 5) 1720

6. A person was given a salary increment of 25%, then again after one month he was given another increment of 25%. Now what percent extra salary does he get compared to his initial salary?

1) 50% 2) 55.5% 3) 56.25% 4) 64% 5) None of these

7. What is the sum of 4^{3}+ 5^{3 }+ 6^{3}+ 7^{3 }+ ... + 15^{3 }?

1) 14400 2) 14364 3) 14386 4) 14372 5) None of these

8. What is the least number which when divided by 15, 18, 24 and 30 leaves the same remainder 13?

1) 973 2) 193 3) 1093 4) 373 5) None of these

9. A sum of money is divided between two persons in the ratio of 17 : 15. If the share of one person isRs 80 less than that of the other, what is the sum?

1) Rs 540 2) Rs 320 3) Rs 960 4) Rs 1280 5) None of these

10. If the annual decrease in the population of a city is 8% and the present population are 80 lakhs, wh at will be the population after 3 years?

1) 7294200 2) 6965310 3) 6229504 4) 6023905 5) None of these

Answers :-

1. 1; The series is:

18 × 6 – 9 = 99

99 × 7 – 11 = 682

682 × 8 – 13 = 5443

5443 × 9 – 15 = 48972

5. 3; The series is:

5 × 6 × 7 = 210

6 × 7 × 8 = 336

7 × 8 × 9 = 504

8 × 9 × 10 = 720

9 × 10 × 11 = 990

10 × 11 × 12 = 1320

11 × 12 × 13 = 1716

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