DIRECTIONS : In each of the following question, a number series is given with one term missing. Choose the correct alternative that will continue the same pattern and fill in the blank space.
| 1. | which is the number that comes next in the sequence.
6, 24, 60, 120, 210?
| ||
|---|---|---|---|
| A. 240 C. 336 | B. 290 D. 504 | ||
| Ans : C. Clearly the given series is 13 - 1 ,23 - 1 ,33 - 3.i.e next number is (73 - 7=343) (343 -7 =336). | |||
| 2. | How many terms are there in the series
210, 208, 215, . . 369?
| ||
|---|---|---|---|
| A. 23 C. 25 | B. 24 D. 26 | ||
| Ans : C. The given series in an A.P in which a=201 and d=7. | |||
| 3. | Which number would replace question mark in the series
7, 12, 19,. . 39
| ||
|---|---|---|---|
| A. 28 C. 45 | B. 32 D. 38 | ||
| Ans : A. The given sequence follows the pattern: | |||
| 4. | Find the missing number in the following sequence
1, 3, 3, 6, 7, 89,. . 12, 21
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|---|---|---|---|
| A. 10 C. 12 | B. 11 D. 13 | ||
| Ans : D. The given sequence is a combination of two series 1,3,7, . . 21 and 3,6,9, . .The pattern followed is 1 is 2+4 and pattern 2 is +3.Thus, missing number =7+6=13. | |||
| 5. | In the series 357, 363, 369, . . what will be the 10th term? | ||
|---|---|---|---|
| A. 405 C. 413 | B. 411 D. 417 | ||
| Ans : B. The given series is an A.P in which a =357 and d= 6.[a+(10 - 1)d] [a+9d =(357 +9 x6)] =(357 + 54) =411. | |||
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