Missing Number (SSC CHSL 2019 Tier -1)

11. Find the missing number? [SSC CHSL 16/10/2020 (Morning)]

(a) 11
(b) 5
(c) 14
(d) 16

Correct Answer: (c) 14

Solution:

12. Find the missing number? [SSC CHSL 16/10/2020 (Afternoon)]

(a) 737
(b) 521
(c) 729
(d) 396

Correct Answer: (a) 737

Solution:131 = (5)² + 6 = 125 + 6

348 = (7)² + 5 = 343 +5

? = (9)² + 8 = 729 +8 = 737

13. Find the missing number? [SSC CHSL 20/10/2020 (Morning)]

(a) S
(b) K
(c) J
(d) R

Correct Answer: (c) J

Solution:The sum of the alphabet numbers of letters which are vertically opposite to each other is 19.
A + R = 19
G + L = 19
Similarly, I + J = 19

14. Find the missing number? [SSC CHSL 20/10/2020 (Evening)]

(a) 11
(b) 16
(c) 12
(d) 14

Correct Answer: (a) 11

Solution:The given pattern follows the following rule:
(4)² - (1)³ = 16 - 1 = 15
(7)² - (3)³ = 49 - 27 = 22
Similarly, (?)² - (4)³ = 57
⇒ (?)² - 64 = 57 ⇒ (?)² = 57 + 64 = 121
⇒ ? = √121 = 11

15. Finding the missing number ? [SSC CHSL 21/10/2020 (Morning)]

(a) 264
(b) 256
(c) 260
(d) 512

Correct Answer: (c) 260

Solution:Here, row wise:
10 × 2 = 20, 20 - 2 × (2 - 1) = 18
30 × 3 = 90, 90 - 3 × (3 - 1) = 84

4 x 68 = 272, 272 - 4 x (4-1) = 260

16. Finding the missing number ? [SSC CHSL 21/10/2020 (Morning)]

(a) 118
(b) 144
(c) 110
(d) 120

Correct Answer: (b) 144

Solution:

17. Finding the missing number ? [SSC CHSL 26/10/2020 (Morning)]

(a) 168
(b) 130
(c) 204
(d) 241

Correct Answer: (d) 241

Solution:(7 + 3)² = 10² = 100 + 16 = 116
(8 + 4)² = 12² = 144 + 16 = 160
(13 + 2)² = 15² = 225 + 16 = 241

18. Finding the missing number ? [SSC CHSL 26/10/2020 (Morning)]

(a) 64
(b) 60
(c) 16
(d) 68

Correct Answer: (d) 68

Solution:Logic: Row wise:

(1st number × 2nd number) - [1st number × (1st number-1)]

In first row: (3 × 30) - 3 ×(3-1) = 90-6 = 84

In second row: (2 x 10) - 2 (2-1) = 20-2 = 18

Similarly, In the third row: (4 x ?) - 4 (4-1) = 260 => 4 x ? = 260 + 12 = ? = 272/4 = 68