What is the number missing from the third target? (Targets are read top to bottom.)FirstSecondThird 5 9 15 16 29 ? 49 89 147
Question and options
What is the number missing from the third target? (Targets are read top to bottom.)
| First | Second | Third |
|---|---|---|
| 5 | 9 | 15 |
| 16 | 29 | ? |
| 49 | 89 | 147 |
- 45
- 48
- 51
- 54
Answer and explanation
Correct answer: B - 48
In each target the next number is 3 times the previous plus k, with k = 1, 2, 3: 5x3+1 = 16, 16x3+1 = 49; 9x3+2 = 29, 29x3+2 = 89; 15x3+3 = 48, 48x3+3 = 147. The missing number is 48.
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CUSAT CAT M.Sc. Bioethics
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