Missing Number (SSC CHSL 2021 Tier -1)

In first row → (12), (12 × 3), (12 × 5) ⇒ (12, 36, 60)

In second row → (24), (24 × 3), (24 × 5) ⇒ (24, 72, 120)

Similarly,

In third row → (33), (33 × 3), (33 × 5) = (33, 99, 165)

Hence, "165" is the correct answer.

{(a - 1) × (b - 1)} = c

In 1st row → {(9 - 1) × (7 - 1)} ⇒ 8 × 6 = 48

In 2nd row → {(12 - 1) × (5 - 1)} ⇒ 11 × 4 = 44

In 3rd row → {(8 - 1) × (13 - 1)} ⇒ 7 × 12 = 84

Hence, "84" is the correct answer.

{(a + b) ÷ 3} = c

In first row → {(86 + 82) ÷ 3}​ ⇒ 168 ÷ 3 = 56

In second row →  {(74 + 67) ÷ 3} ⇒ 141 ÷ 3​ = 47

In third row → {(54 + 48) ÷ 3) ⇒ 102 ÷ 3 = 34

Hence, "34" is the correct answer.

√1st num × 2nd num = 3rd num 

In first row → √16 × 12 ⇒ 4 × 12 = 48

In second row → √9 × 8 ⇒ 3 × 8 = 24

In third row → √$4$ = 2 × 24 = 48

Hence, "48" is the correct answer.

For first row → 86 + 72 = 158

For second row → 98 + 111 = 209

For third row → 76 + 65 = 141

Hence, "141" is the correct answer.

In first row → {(5 + 8) × 3} ⇒ 13 × 3 = 39

In second row → {(7 + 5) × 3} ⇒ 12 × 3 = 36

In third row → {(11 + 9) × 3} ⇒ 20 × 3 = 60

Hence, "60" is the correct answer.

{(a × 4) + 3} = b and {(b × 3) + 6} = c

In first row → {(12 × 4) + 3} = 51 and {(51 × 3) + 6} = 159

In second row → {(9 × 4) + 3} = 39 and {(39 × 3) + 6} = 123

Similarly,

In last row → {(8 × 4) + 3} = 35 and {(35 × 3) + 6} = 111

Hence, "111" is the correct answer.

{(a × b) + a} = c

In first row → {(17 × 8) + 17} ⇒ 136 + 17 = 153

In second row → {(19 × 6) + 19} ⇒ 114 + 19 = 133

Similarly,

In third row → {(13 × 7) + 13} ⇒ 91 + 13 = 104

Hence, "104" is the correct answer.

In first row → {(15 × 4) + 2} ⇒ 60 + 2 = 62 & {(62 × 2) - 4} ⇒ 124 - 4 = 120

In third row → {(21 × 4) + 2} ⇒ 84 + 2 = 86 & {(86 × 2) - 4} ⇒ 172 - 4 = 168

Similarly,

In second row → {(18 × 4) + 2} ⇒ 72 + 2 = 74 & {(74 × 2) - 4} ⇒ 148 - 4 = 144

Hence, "144" is the correct answer.

In first row → 32 + 40 = 72 & 72 ÷ 4 = 18

In second row → 38 + 46 = 84 & 84 ÷ 4 = 21

Similarly,

In third row → 33 + 43 = 76 & 76 ÷ 4 = 19

Hence, "19" is the correct answer.