Answer:
If we take number from 1 to 10 the combination of subtracting for the value of 5 will be
( 6, 1) , (7,2) , (8,3) , (9, 4) and (10,5)
Similarly for the number range from 11 to 20 will follow the same rule
(6 – 1) *5 =25
(7 - 2) * 5 = 25
(8 – 3) * 5= 25
(9 – 4) *5 =25
(10 – 5) * 5 =25
so these are the equation from which we can make the value of 25 by using only multiplication and subtraction mathematical rule
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