Missing Number (SSC CHSL 2021 Tier -1)

1. Find the missing number? [SSC CHSL 24/05/2022 (Evening)]

(a) 173
(b) 192
(c) 137
(d) 129

Correct Answer: (d) 129

Solution:In first row: 3³ + 4² = 27 + 16 = 43
In second row: 6³ + 5² = 216 + 25 = 241
In third row: 2³ + 11² = 8 + 121 = 129

2. Find the missing number? [SSC CHSL 24/05/2022 (Evening)]

(a) 34
(b) 30
(c) 35
(d) 37

Correct Answer: (d) 37

Solution:Logic (in row): (1st number + 2nd number) × 4 + 4 = Third number
(9 + 21) × 4 + 4 = 124
(11 + 25) × 4 + 4 = 148
(17 + 37) × 4 + 4 = 220

3. Find the missing number? [SSC CHSL 25/05/2022 (Morning)]

(a) 192
(b) 127
(c) 172
(d) 129

Correct Answer: (d) 129

Solution:For first row: 2³ + 7² = 8 + 49 = 57
For second row: 6³ + 3² = 216 + 9 = 225
For third row: 5³ + 2² = 125 + 4 = 129

4. Find the missing number? [SSC CHSL 25/05/2022 (Afternoon)]

(a) 125
(b) 110
(c) 120
(d) 140

Correct Answer: (c) 120

Solution:Logic (in row): (a × b) × 5 = c
(3 × 2) × 5 = 30, (7 × 5) × 5 = 175
Similarly, (4 × 6) × 5 = 120

5. Find the missing number? [SSC CHSL 26/05/2022 (Morning)]

(a) 80
(b) 96
(c) 88
(d) 98

Correct Answer: (c) 88

Solution:Logic (in row): (a × 4) - 2 = b, (b × 2) + 4 = c
(13 × 4) - 2 = 50, (50 × 2) + 4 = 104
(11 × 4) - 2 = 42, (42 × 2) + 4 = 88
(18 × 4) - 2 = 70, (70 × 2) + 4 = 144

6. Find the missing number? [SSC CHSL 26/05/2022 (Evening)]

(a) 52
(b) 41
(c) 48
(d) 50

Correct Answer: (b) 41

Solution:Logic: 2a + b = c
For first row: 2(17) + 26 = 34 + 26 = 60
For second row: 2(8) + 15 = 16 + 15 = 31
For third row: 2(11) + 19 = 22 + 19 = 41

7. Find the missing number? [SSC CHSL 27/05/2022 (Afternoon)]

(a) 65
(b) 35
(c) 45
(d) 55

Correct Answer: (d) 55

Solution:Logic: [(a × b) + (a + b)] = c
In first row: [(5 × 6) - (5 + 6)] = (30 - 11) = 19
In second row: [(7 × 7) + (7 + 7)] = (49 - 14) = 35
In third row: [(8 × 9) + (8 + 9)] = (72 - 17) = 55

8. Find the missing number? [SSC CHSL 27/05/2022 (Evening)]

(a) 112
(b) 96
(c) 90
(d) 102

Correct Answer: (d) 102

Solution: Logic: [(a × b) ÷ 2] = c
In first row: (24 × 9) ÷ 2 = 216 ÷ 2 = 108
In second row: (38 × 5) ÷ 2 = 190 ÷ 2 = 95
In third row: (12 × 17) ÷ 2 = 204 ÷ 2 = 102

9. Find the missing number? [SSC CHSL 31/05/2022 (Afternoon)]

(a) 129
(b) 131
(c) 123
(d) 132

Correct Answer: (d) 132

Solution:In 1st row: 187 - 23 = 164, 164 - 23 = 141
In 2nd row: 215 - 23 = 192, 192 - 23 = 169
In 3rd row: 178 - 23 = 155, 155 - 23 = 132

10. Find the missing number? [SSC CHSL 01/06/2022 (Morning)]

(a) 184
(b) 148
(c) 146
(d) 164

Correct Answer: (a) 184

Solution:Logic: (1st num × 4) - 2 × 2nd num, (2nd num × 2) + 4 = 3rd num
(9, 34, 72): (9 × 4) - 2 = 34 and (34 × 2) + 4 = 68 + 4 = 72
(7, 26, 56): (7 × 4) - 2 = 28 - 2 = 26 and (26 × 2) + 4 = 52 + 4 = 56
Similarly, (23 × 4) - 2 = 92 - 2 = 90 and (90 × 2) + 4 = 180 + 4 = 184