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Question

Find the values of the letters A and B if .
Solution:

A + 5 = 2 ⇒ A = 7

B = 3 + 2 + 1 = 6

solution A = 7, B = 6.
 

Question 2

Find the values of the letters A, B and C if .

Solution:


solution A = 5, B = 4, C = 1.


Question 3

Find the value of the letter A if .

Solution:


Question 4

Find the values of the letters A and B if
Solution:


Question 5

Find the values of the letters A, B and C if .

Solution:



Question 6

Find the values of the letters A, B and C if.

Solution:


Question 7

Find the values of the letters A, B and C if .
Solution:



Question 8

Find the values of the letters A, B and C if.

Solution:


Question 9

Find the values of the letters A, B and C if.
Solution:


Question 10

Find the values of the letters A, B and C if.
Solution:


Question 11

If 21y5 is a multiple of 9. Where y is a digit. What is the value of y?

Solution:


Question 12

If 31z5 is a multiple of 9, where z is a digit, what is the value of z?

Solution:

Sum of digits =

If then divisible by 9

If then divisible by 9

Hence z can take the value 0 or 9.

Question 13

If 24x is a multiple of 3, where x is a digit , what is the value of x?


Solution:

divisible by 3

, divisible by 3

divisible by 3

divisible by 3

Hence x can take the values 0, 6, 9 and 3.

Question 14

If 31z5 is a multiple of 3, where z is a digit, what right be the value z?

 


Solution:

divisible by 3

divisible by 3

divisible by 3

divisible by 3

Hence z can take the values 0, 6, 9 and 3.





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