let x- unit digit
2x + 1- twice the tens by one
x + 2x +1 = 10
x + 2x = 10 - 9
3x= 9
x = 3
therefore : x = 3
2x + 1 = 7
the number is 37.
you can try checking it:
x + 2x + 1 = 10
3 + 2(3) = 10-1
3 + 6 = 9
9 = 9
The units digit of a two digit number exceeds twice the tens digit by 1. Find the number if the sum of its digits is 10.
18 is the only number that matches these criteria.
2.3
The number is 84.Assign the digits in the number the letters a and b.GIVEN: a + b = 12GIVEN: a = 2bSolve for b, then solve for a.2b + b = 123b = 12b = 4a = 2(4) = 8
9218 9425
The units digit of a two digit number exceeds twice the tens digit by 1. Find the number if the sum of its digits is 10.
362x(3x6)
It is 99,887,765
804
18 is the only number that matches these criteria.
17
2.3
22621, 44742, 66863, 88984
The smallest ten-digit number that has two digits the same is 1000000000. However, this number does not meet the requirement of having two digits the same. The smallest valid ten-digit number with two digits the same is 1000000001, where the digit '0' appears eight times and '1' appears twice.
47 Impossible problem!
The number is 84.Assign the digits in the number the letters a and b.GIVEN: a + b = 12GIVEN: a = 2bSolve for b, then solve for a.2b + b = 123b = 12b = 4a = 2(4) = 8
9218 9425