Question

What number am I ? I'm smaller than 80. I am an odd number. I'm a multiple of 7. And the difference of my 2 digits is 1.​

Answer 1

Answer : The number is 21.

Step-by-step explanation:

Given :

I'm smaller than 80.

I am an odd number.

I'm a multiple of 7.

The difference of my 2 digits is 1.

To Find :

What number am I ?

Solution :

Multiples of 7 which are less than 80 :

=> 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77

Odd numbers from these multiples are :

=> 7, 21, 35, 49, 63, 77

Now, check which number has a difference of 1 between its two digits :

=> The number 21 has a difference of 1 between its two digits.

=> 2 - 1 = 1.

Hence, The number is 21

I'm smaller than 80.

=> 21<80

I am an odd number.

=> 21 is an odd number.

I'm a multiple of 7.

=> 21 is a multiple of 7.

The difference of my 2 digits is 1.

=> difference of its 2 digits is 1.

=> 2 - 1 = 1.

Hence, The number which satisfies the given question is 21.

Answer 2

☆ Question Given :

• What number am I ? I'm smaller than 80. I am an odd number. I'm a multiple of 7. And the difference of my 2 digits is 1.

☆ Required Solution :

✯ Value Given to us :

• ⟾ I'm smaller than 80

• ⟾ I am an odd number.

• ⟾ I'm a multiple of 7.

• ⟾ difference of my 2 digits is 1.

✯ According to Question :

☯ Multitude of 7 less than 80

• ⟾ 7 , 14 , 21 , 28 , 35 , 42 , 49 , 56 , 63 , 70 , 77

✯ Selecting Odd number :

• ⟾ 7 , 21 , 63 , 77 , 35

✯ According to Question :

• ➟ the difference of my 2 digits is 1.

• ➟ Number 21 satisfied all requirements

• ➟ 2 - 1 = 1

• ➟ 21 = Multiple of 7

• ➟ 21 = Odd number

☆ Therefore :

• ➥ The number is 21

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