Missing Number (SSC CHSL 2020 Tier -1)

Total Questions: 6

1. Find the missing number? [S.S.C CHSL 15/04/2021 (Morning)]

Correct Answer: (d) 12
Solution:The pattern followed here is :

(a), {(a² + b²) ÷ 2}, (b)

(6  90  ?) → {(36 + x²) ÷ 2} = 90

⇒ x² = 180 - 36 ⇒ x² = √144 ⇒ x = 12

Hence, "12" is the correct answer.

2. Find the missing number? [S.S.C CHSL 19/04/2021 (Morning)]

Correct Answer: (d) 8
Solution:The pattern followed here is :

In row → [{b - (a ÷ 2)} ÷ 3] = c

(22, 35, ?) → [{35 - (22 ÷ 2)} ÷ 3] ⇒ {(35 - 11) ÷ 3} ⇒ 24 ÷ 3 = 8

Hence, "8" is the correct answer.

3. Find the missing number? [S.S.C CHSL 19/04/2021 (Afternoon)]

Correct Answer: (b) 14
Solution:The pattern followed here is :

In each row → {b + (1.5 × a)} = c

(8, x, 26) → {x + (1.5 × 8)} = 26 ⇒ x = 26 - 12 ⇒ x = 14

Hence, "14" is the correct answer.

4. Find the missing number? [S.S.C CHSL 05/08/2021 (Morning)]

Correct Answer: (a) 7
Solution:The pattern followed here is :

Row wise pattern → (2a + 3c) = b

(13, 50, 8) → {(2 × 13) + (3 × 8)} ⇒ 26 + 24 = 50

(12, 39, 5) → {(2 × 12) + (3 × 5)} ⇒ 24 + 15 = 39

Similarly,

(15, 51 ,? ) → {(2 × 15) + (3x)} = 51 ⇒ 3x = 51 - 30 ⇒ x = 21 ÷ 3 = 7

Hence, "7" is the correct answer.

5. Find the missing number? [S.S.C CHSL 12/08/2021 (Morning)]

Correct Answer: (b) 7
Solution:The pattern followed here is :

Row wise pattern → (a, b, c) → {a + 3(a - c)} = b

(12, 15, 11) → {12 + 3(12 - 11)} ⇒ 12 + 3 = 15

Similarly,

(16, ?, 19) → {16 + 3(16 - 19)} ⇒ 16 - 9 = 7

Hence, "7" is the correct answer.

6. Find the missing number? [S.S.C CHSL 12/08/2021 (Afternoon)]

Correct Answer: (a) 32
Solution:The pattern followed here is :

In row

{(9 × 3) + (16 ÷ 2)} ⇒ 27 + 8 = 35

{(8 × 3) + (18 ÷ 2)} ⇒ 24 + 9 = 33

{(5 × 3) + (34 ÷ 2)} ⇒ 15 + 17 = 32

Hence, "32" is the correct answer.