Missing Number (SSC CHSL 2020 Tier -1)

Total Questions: 6

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

Correct Answer: (d) 12
Solution:Logic → (a, a² + b² ÷ 2, b)
So, (6  90  ?) → (36 + ?²) ÷ 2 = 90
?² = 180 - 36 → ?² = √ 144  = 12

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

Correct Answer: (d) 8
Solution:Logic (in row) → (2nd No. -  First No. ÷ 2) ÷ 3 = Third number
(22, 35, ?) → [(35 ) - 22/2] ÷ 3
(35 - 11) ÷ 3 = 24 ÷  3  = 8

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

Correct Answer: (b) 14
Solution:Logic → In each row a : b : b + (1.5 × a)
So, 26 = (1 × 8) + b→ b = 26 - 12 = 14

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

Correct Answer: (a) 7
Solution:Logic → Row wise pattern → { a, (2a + 3b), b}
(13, 50 , 8 ) = {13, (26 +24), 8 }

(12, 39 ,5 ) = {12, (24 +15), 39}

(15, 51 ,7 ) = {15, (30 +21), 7}

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

Correct Answer: (b) 7
Solution:Logic → Row wise pattern →
(a, b, c), Where a + 3(a - c) = b
So, (12, 15, 11) → 12 + 3(12 - 11) = 15
Similarly, (16, ?, 19) → 16 + 3(16 - 19) = 16 - 9 = 17

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

Correct Answer: (a) 32
Solution:Logic (in row):
(9 × 3) + 16 ÷ 2 → 27 + 8 = 35
(8 × 3) + 18 ÷ 2 → 24 + 9 = 33
(5 × 3) + 34 ÷ 2 → 15 + 17 = 32