Question

28 X 99 = 28 x ______ - 28 x 1​

Answer 1

Answer:

ANSWER

X=28+(1×2×3×....×16×28)

Y=17+(1×2×3×....×16×17)

X−Y=(28−17)+(1×2×3×4×....×16)×(28−17)

=11×(1+1×2×3×4×....×16)

⇒X−Y is a composite number

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Answer 2

Answer:

let it be x

28*99=28x-28

28*99=28(x-1)

28*99/28 = x-1

99=x - 1

99 + 1 = x

therfore x = 100

Step-by-step explanation:

now we can also check our answer by fiiling the blank as 100

now

left hand side

28*99=2772

right hand side

28*100 - 28*1

2800-28

2772

hence LHS = RHS