Missing Number (SSC CHSL 2021 Tier -1)

21. Find the missing number? [SSC CHSL 07/06/2022 (Afternoon)]

(a) 9
(b) 15
(c) 8
(d) 18

Correct Answer: (c) 8

Solution:Logic (in row): ((a - b) ÷ 4)³ = c
(24 - 12) ÷ 4 = (3)³ = 27
(36 - 13) ÷ 4 = (4)³ = 64
(32 - 24) ÷ 4 = (2)³ = 8

22. Find the missing number? [SSC CHSL 08/06/2022 (Morning)]

(a) 84
(b) 80
(d) 78
(c) 74

Correct Answer: (d) 78

Solution:Logic:
(Third number - Second number) × 2 = 1st number
(100 - 38) 62 × 2 = 124
Similarly, (64 - 25) 39 × 2 = 78
By option (78 - 31) 47 × 2 = 94

23. Find the missing number? [SSC CHSL 08/06/2022 (Afternoon)]

(a) 67
(b) 73
(c) 92
(d) 59

Correct Answer: (d) 59

Solution:Logic: (1st number × 3 - 2nd number × 4) = 3rd number
First row: (67 × 3 - 25 × 4) = 201 - 100 = 101
Second row: (55 × 3 - 17 × 4) = 165 - 68 = 97
Third row: (45 × 3 - 19 × 4) = 135 - 76 = 59

24. Find the missing number? [SSC CHSL 08/06/2022 (Evening)]

(a) 58
(b) 46
(c) 30
(d) 34

Correct Answer: (d) 34

Solution:Logic: a × 2 - (b ÷ 5) = c
First row: (12 × 2 - 25 ÷ 5) = 24 - 5 = 19
Second row: (35 × 2 - 50 ÷ 5) = 70 - 10 = 60
Third row: (24 × 2 - 70 ÷ 5) = 48 - 14 = 34

25. Find the missing number? [SSC CHSL 09/06/2022 (Afternoon)]

(a) 38
(b) 45
(c) -40
(d) -35

Correct Answer: (b) 45

Solution:In first row: 58 + (-28) = 30 × (-3) = -90
In second row: 17 + 21 = 4 × (-3) = -12
Similarly, for third row: -8 + (-7) = -15 × (-3) = 45

26. Find the missing number? [SSC CHSL 09/06/2022 (Afternoon)]

(a) 19
(b) 17
(c) 15
(d) 18

Correct Answer: (b) 17

Solution:Logic:

[(First no./2 + (Second no./3)] = 3rd number

First row: 32/ $2 + 51/3 = 16 + 17 = 33$

Second row: 28/ $2 + 33/3 = 14 + 11 = 25$

Third row: 16/ $2 + 27/3 = 8 + 9 = 17$

27. Find the missing number? [SSC CHSL 09/06/2022 (Evening)]

(a) 129
(b) 127
(c) 125
(d) 120

Correct Answer: (a) 129

Solution:2³ + 3² = 8 + 9 = 17
4³ + 6² = 64 + 36 = 100
Similarly, 5³ + 7² = 125 + 49 = 129

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

(a) 157
(b) 153
(c) 151
(d) 155

Correct Answer: (b) 153

Solution:Logic → (a × b) - 3 → c

(5 × 16) - 3 → 77,
(13 × 12) - 3 → 153
(8 × 19) - 3 → 149

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

(a) 36
(b) 30
(b) 30
(d) 49

Correct Answer: (a) 36

Solution:Logic → (13 - 8) = 5 → 5² = 25
(7 - 12) = - 5 → (-5)² = 25
Similarly, (15 - 9) = 6 → 6² = 36

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

(a) 122
(b) 125
(c) 115
(d) 109

Correct Answer: (a) 122

Solution:Logic → (b + c) → a

91 + 71 → 162
126 + 92 → 218
Similarly, 79 + ? → 194, ? → 115