Question

guess and write
what is my secret number
1.it is larger than half of 100
2.it is more than 6 tens and less than 7 tens the
3.tens digit is one more than ones digit 4.together the digit have a sum of 11
___________________​

Answer 1

65

Step-by-step explanation:

★Assume -

• The given number is 10x + y.

★Given -

• 10x + y > 50
• 60 < 10x + y > 70
• x = y + 1---------(1)
• x + y = 11--------(2)

★To find -

• The number.

★Solution -

Only (1) and (2) are required to solve the question.

→ x + y = 11

→ y + 1 + y = 11 {from (1)}

→ 2y = 11 - 1

→ 2y = 10

→ y = 10/2

→ y = 5 {putting in (1)}

→ x = 5 + 1

→ x = 6

∴ the number is 10(6) + 5

= 65