Question

42=18 and 73=36 and 65=9 and 83=45 then 91=?​

Answer 1

Answer:

652 is ur answer.

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Answer 2

Mental Ability

We are given that :

42 = 18

73 = 36

65 = 9

then

91 = ?

Let us observe these series carefully :

1. 42 - 18 = 24

2. 73 - 36 = 37

3. 65 - 9 = 56

For understanding a series in the above examples, let us take the help of variables.

Let a number be xy.

When we are subtracting any number from xy then we are getting yx.

• 24 (4 and 2 replaced with each other)
• 37 (3 and 7 replaced with each other)
• 56 (5 and 6 replaced with each other)

So,

We need to find a number which when subtracted from 91 gives a result of 19.

Let that no. be x :

91 - x = 19

x = 91 - 19

x = 72

Therefore,

The fourth series is :

91 = 72