Question

the sum of the digits of a two digit number is 10.the ten's digit is 4 times the ones digit

Answer 1

Answer:

The ten's digit and one's digit number are 8 and 2 respectively.

Step-by-step explanation:

Let the ten's digit and one's digit be x and y respectively.

According to the question,

x + y = 10     (1)

x = 4y           (2)

Put the value of x from equation (2) in equation (1),

4y + y = 10

5y = 10

y = 10/5

y = 2

Put the value of y in equation (2),

x = 4(2)

x = 8

I hope this answer is helpful for you.

Answer 2

Answer:

82

Step-by-step explanation:

2-digit number is ab

a+b=10 and a=4b

• ⇒ 4b+b=10
• 5b=10
• b=2
• a=4b=8

ab=82