Missing Number (SSC CHSL 2019 Tier -1)

(First number )² - (Second number)²=(Third number)

In first figure: (25)² - (5)² = 625 - 25 = 600

In second figure: (27)² - (3)² = 729 - 9 = 720

Similarly, in the third figure: (7)² - (9)² = 880 ⇒ (?)² = 880 + 81 = 961? = √961 = 31

Hence, "31" is the correct answer.

(First number)+(Second number)+(Third number)⇒(Fourth number)*2=Fifth number

10 + 5 + 6 ⇒ 21 × 2 = 42

17 + 3 + 14 ⇒ 34 × 2 = 68

8 + 15 + 23 ⇒ 46 × 2 = 92

So, 23 will be the answer.

Hence, "23" is the correct answer.

(First number)*(Second number)-(Third number)=(Fourth number)

(5 6 4 26) → 5 × 6 - 4 = 26

(6 5 3 7) → 7 × 6 - 5 = 37

(4 8 10 ?) → 4 × 8 - 10 = 22

Hence, "22" is the correct answer.

First number +1 ⇒ Total*(Third number) = (Second number)

9 + 1 ⇒ 10 × 13 = 130

14 + 1 ⇒ 15 × 9 = 135

7 + 1 ⇒ 8 × 21 = 168

Hence, "21" is the correct answer.

(First number)²+(Second number)²⇒ Total/2 = (First row number)

(4)² + (6)² ⇒16 + 36 = 52,    52/ 2 = 26

(7)² + (1)² = 49 + 1 = 50;  50 / 2 = 25

Similarly,
(5)² + (3)² = 25 + 9 = 34;
34/2 = 17

Hence, "17" is the correct answer.

The pattern followed here is :

(First number) *(Second number) - (Second number) = (Third Number)

25*5-5=120,

23*7-7=154

Similarly, 13*13-13=156

Hence, "13" is the correct answer.

(First number + Second number + Third number)² ⇒ (Total Number)² = (Fourth number)

In column (i), (11 + 5 + 3)² = (19)² = 361
In column (ii), (17 + 3 + 7)² = (27)² = 729
In column (iii), (8 + 15 + 12)² = (35)² = 1225

Hence, "12" is the correct answer.

(First number + Second number )⇒ (Total Number)/2 = (Third number)

Choose the Answer and Put the value in the Equation

In column (i), 16 + 4 = 20 ⇒ 20/2 = 10
In column (ii), 30 + 34 = 64 ⇒ 64/2 = 32
In column (iii), 18 + 62 = 80 ⇒ 80/2 = 40

Hence, "62" is the correct answer.

In column (iii), the number is the square of the sum of numbers in the first two columns.
6 + 4 = 10 ⇒ (10)² = 100
7 + 5 = 12 ⇒ (12)² = 144
Similarly, 9 + 4 = 13 ⇒ (13)² = 169

Hence, "4" is the correct answer.

The middle column has the

HCF of numbers in the other two columns

HCF (162, 108) = 54 ⇒? = 54/2 = 27

Hence, "27" is the correct answer.