Question

In an AP, tn represents the nth term. t, and tz are
two-digit numbers such that their digits are the
same, but their positions are interchanged.
If tz – t1 = -18 and the sum of the digits of ti is 8,
then find the value of
a. 3.5
b. 4.5
C. 5.5
d. 6.5​

Answer 1

Answer:

4.5

Step-by-step explanation:

the sum of digits of time is 4.5

Answer 2

Given : ti and tz are  two-digit numbers such that their digits are the  same, but their positions are interchanged.

tz -  ti = -18

sum of the digits of ti is 8,

To Find :  Value of Digits

Solution:

ti and tz are  two-digit numbers such that their digits are the  same, but their positions are interchanged.

ti = AB  => value = 10A + B

tz = BA => Value = 10B + A

tz -  ti = -18

10B + A -  (10A + B)  = - 18

=> 9B - 9A = -18

=> B - A  = - 2

=> A  - B  =  2

sum of the digits of ti is 8

=> A + B = 8

2A = 10

=> A = 5

& B = 3

ti = 53

tz = 35

Digits are  3 & 5

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