Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 17 | 18 | 19 |
| 21 | 22 | ? |
| 396 | 437 | 520 |
Option 1: 30
Option 2: 27
Option 3: 25
Option 4: 28
Correct Answer: 25
Solution : Given:
| 17 | 18 | 19 |
| 21 | 22 | ? |
| 396 | 437 | 520 |
The pattern can be observed running vertically down the columns.
Column 1:
(17 × 21) + (17 + 21) + 1 = 357 + 38 + 1 = 396
Column 2:
(18 × 22) + (18 + 22) + 1 = 396 + 40 + 1 = 437
Column 3:
(19 × (?)) + (19 + (?)) + 1 = 520
⇒ (19 × (?)) + 19 + (?) = 520 – 1
⇒ (19 × (?)) + 19 + (?) = 519
⇒ (19 × (?)) + (?) = 519 – 19 = 500
⇒ (?) × (19 + 1) = 500
⇒ (?) × 20 = 500
⇒ (?) = 500 ÷ 20 = 25
So, 25 is the missing number. Hence, the third option is correct.
Related Questions
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 125 | 8 | 64 |
| 27 | 55 | 72 |
| 135 | ? | 288 |
Option 1: 192
Option 2: 144
Option 3: 110
Option 4: 208
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 19 | 9 | 140 |
| 17 | 9 | 130 |
| ? | 5 | 120 |
Option 1: 47
Option 2: 28
Option 3: 24
Option 4: 19
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 17 | 41 | ? |
| 15 | 24 | 29 |
| 49 | 106 | 85 |
Option 1: 37
Option 2: 28
Option 3: 32
Option 4: 24
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 54 | 40 | 56 |
| 68 | 57 | 44 |
| 47 | 39 | ? |
Option 1: 22
Option 2: 30
Option 3: 32
Option 4: 39
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 14 | 26 | 182 |
| 24 | 16 | 192 |
| ? | 22 | 187 |
Option 1: 21
Option 2: 30
Option 3: 23
Option 4: 17
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