Question

How to. supply the missing digits.

8? 7?
+32? 4
_______

Answer 1

Answer:

The missing number is found to be as 6.

This is because a relationship between the numbers in the given series is determined as the third digit ‘6’ which is the product of the first two digits ‘2’ and ‘3’, the sixth digit ‘20’ is the product of fourth digit ‘4’ and fifth digit ‘5’ and the ninth digit ‘18’ is the product of the seventh digit ‘6’ and eighth digit ‘3’

Therefore, the seventh digit should be “6”.

The series is 2, 3, 6, 4, 5, 20, 6, 3, 18.

Example 2: Find the missing number in the following number line: 1, 3, 9, 15, 25,? , 49.

Solution:

The missing number is found to be 35

This is because all the sequence of numbers are squares and (squares – 1) alternatively like

1 square = 1,

2 square = 4 and then 4 – 1 = 3,

3 square = 9,

4 square = 16 and then 16 – 1 = 15,

5 square = 25,

6 square = 36 and then 36 – 1 = 35

7 square = 49.

Therefore, the number line will be 1, 3, 9, 15, 25, 35, 49.

Example 3: Find the missing number in the following sequence 5, 7, 11, ?, 17, 19

Solution:

The missing number is found to be 13.

This is because all the given orders of numbers in a number line contain the prime numbers 5, 7, 11, 13, 17, 19 which are all divisible by only ‘1’ and itself.

Therefore, the number line series will be 5, 7, 11, 13, 17, 19

Step-by-step explanation: