Question

A number has four digits.Its last digit is twice the first digit.Its second digit is your answer will be twelve.What number is it?​

Answer 1

Answer:4368

let the first digit be x.

last digit will be 2x.

sum of first and last digit is 12.

2x + x = 12

3x = 12

x = 4

then, first number be 4 and last number be 8.

the second no. is 3 less than third number

Third number= 6

second number=6-3=3

then the number formed is 4368

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Answer 2

Since the last digit is twice the first we can say that ;-

➥ The first digit is X

➥ And the last digit is 2x

Since the third is 6 and the second digit is 3 less that the third means :-

• The second digit = 6 - 3 = 3

• And the third digit is 6

Now we have an equation

• since the first and last digit = 12

• Means x + 2x = 12

• 3x = 12

• Hence x = 4

Therefore

➥ The first digit = 4

➥ And the last digit is 4 × 2 = 8

Answer is 4368.