Missing Number (SSC MTS 2020 Tier -1)

1. Find the missing number? [SSC MTS 05/10/2021 (Afternoon)]

(a) 337
(b) 347
(c) 343
(d) 333

Correct Answer: (d) 333

Solution:5³ - 10 → 115, 6³ - 10 → 206
7³ - 10 → 333, 8³ - 10 → 502
9³ - 10 → 719 Hence, ? = 333

2. Find the missing number? [SSC MTS 06/10/2021 (Afternoon)]

(a) 107
(b) 90
(c) 129
(d) 147

Correct Answer: (a) 107

Solution:Here the pattern: Row-wise →
(1st number - 2nd number) ÷ 2 → 3rd number
(445 - 285) ÷ 2 → 80, (550 - 332) ÷ 2 → 109
Similarly, (655 - 441) ÷ 2 → 107

3. Find the missing number? [SSC MTS 06/10/2021 (Evening)]

(a) 69
(b) 66
(c) 74
(d) 71

Correct Answer: (a) 69

Solution:(1st number × 2nd number) + (1st number + 2nd number) = 3rd number
In row (i), (9 × 7) + (9 + 7) → 79
In row (ii), (7 × 8) + (7 + 8) → 56 + 15 → 71
In row (iii), (6 × 9) + 15 → 69

4. Find the missing number? [SSC MTS 07/10/2021 (Afternoon)]

(a) 34
(b) 20
(c) 18
(d) 36

Correct Answer: (c) 18

Solution:Logic → Column-wise →
(1st term - 2nd term)² = 3rd term
For 1st column: (28 - 20)² → 8² = 64
For 2nd column: (45 - 36)² → 9² = 81
Similarly, for 3rd column: (22 - 18)² → 4² = 16

5. Find the missing number? [SSC MTS 08/10/2021 (Afternoon)]

(a) 61
(b) 77
(c) 82
(d) 69

Correct Answer: (d) 69

Solution:Here, the logic: Row wise:
(1st term × 2) + (2nd term × 3) = 3rd term
For 1st row: (7 × 2) + (12 × 3) → 53
For 2nd row: (10 × 2) + (11 × 3) → 53
Similarly, for the 3rd row: (12 × 2) + (15 × 3) → 69

6. Find the missing number? [SSC MTS 13/10/2021 (Evening)]

(a) 720
(b) 850
(c) 900
(d) 950

Correct Answer: (c) 900

Solution:Logic → In Row I, 7 × 3 = 21, 21 × 4 = 84, 84 × 5 = 420
Similarly, in Row II, 15 × 3 = 45, 45 × 4 = 180, A × 5 = 900, B

7. Find the missing number? [SSC MTS 18/10/2021 (Evening)]

(a) 320
(b) 390
(c) 340
(d) 310

Correct Answer: (d) 310

Solution:Horizontally multiply 1st term by 10, 2nd term by 5 and then add 1st and 2nd term:
15 × 10 + 14 × 5 → 220
20 × 10 + 14 × 5 → 310
11 × 10 + 40 × 5 → 310

8. Find the missing number? [SSC MTS 20/10/2021 (Evening)]

(a) 12
(b) 10
(c) 9
(d) 11

Correct Answer: (d) 11

Solution:Logic:
Column-wise: (a² + b²) × 2 = c
(5² + 7²) × 2 = 148, (9² + 3²) × 2 = 180
Similarly, (5² + x²) × 2 = 292, 25 + x² = 146
146 = 25 + x² hence x = 11

9. Find the missing number? [SSC MTS 26/10/2021 (Evening)]

(a) 120
(b) 131
(c) 111
(d) 143

Correct Answer: (b) 131

Solution:Logic → In row, (a² - b³) = c
15² - 4³ → 225 - 64 = 161
16² - 5³ → 256 - 125 = 131

10. Find the missing number? [SSC MTS 27/10/2021 (Morning)]

(a) 298
(b) 230
(c) 216
(d) 244

Correct Answer: (c) 216

Solution:Logic here is:
8 × 14 = 112, 112 × 2 = 224
11 × 15 = 165, 165 × 2 = 330
Similarly, 9 × 12 = 108, 108 × 2 = 216