Missing Number (SSC CPO 2020 Tier -1)

In each column {(a + 1) × (b + 1)} = c

{(5 + 1) × (7 + 1) ⇒ 6 × 8 = 48

Hence, "5" is the correct answer.

{4 × (a - b)} = c

{(54 - 40) × 4} ⇒ 14 × 4 = 56

{(68 - 57) × 4} ⇒ 11 × 4 = 44

Similarly,

{(47 - 39) × 4} ⇒ 8 × 4 = 32

Hence, "32" is the correct answer.

In each row, {(a × 2) + 2} = b & {(b × 2) + 2} = c

{(28 × 2) + 2} ⇒ 56 + 2 = 58

{(58 × 2) + 2} ⇒ 116 + 2 = 118

Similarly,

In the second row,

{(21 × 2) + 2} ⇒ 42 + 2 = 44 & {(44 × 2) + 2} ⇒ 88 + 2 = 90

In the third row,

{(47 × 2) + 2} ⇒ 94 + 2 = 96 & {(96 × 2) + 2} ⇒ 192 + 2 = 194

Hence, "194" is the correct answer.

row wise:

{(a × b) ÷ 4} = c

{(14 × 28) ÷ 4} ⇒ 392 ÷ 4 = 98

{(7 × 48) ÷ 4} ⇒ 336 ÷ 4 = 84

Similarly,

{(x × 60) ÷ 4} = 60

⇒ 60x = 240

⇒ x = 4

Hence, "4" is the correct answer.

In each column {(a + 1) × c} = b

{(19 + 1) × 14} ⇒ 20 × 14 = 280

Hence, "280" is the correct answer.

In first row,

54 + 18 = 72 & 72 + 18 = 90

In second row,

79 + 18 = 97 & 97 + 18 = 115

Similarly,

In third row,

83 + 18 = 101 & 101 + 18 = 119

Hence, "119" is the correct answer.

In each column

a² - b² = c

8² - 3² ⇒ 64 - 9 = 55

Hence, "55" is the correct answer.

In each row {(a × b) ÷ 2} = c

{(14 × 26) ÷ 2} ⇒ 364 ÷ 2 = 182

Similarly,

{(x × 22) ÷ 2} = 187

⇒ 22x = 374

⇒ x = 17

Hence, "17" is the correct answer.

In each column → {(2 × a) + b} = c

{(17 × 2) + 15} ⇒ 34 + 15 = 49

{(41 × 2) + 24} ⇒ 82 + 24 = 106

Similarly,

{(x × 2) + 29} = 85

⇒ 2x = 85 - 29

⇒ x = 56 ÷ 2

⇒ x = 28

Hence, "28" is the correct answer.

Column wise

∛125 × 27 ⇒ 5 × 27 = 135

∛64 × 72 ⇒ 4 × 72 = 288

Similarly,

∛8 × 55 ⇒ 2 × 55 = 110

Hence, "110" is the correct answer.