A number is divisible by 9 if the sum of its digits is divisible by 9.Let
the number be x.
∴5 + 4 + 3 +2 + x + 7 = 21 + x
If we put x = 6, then it is divisible by 9.
∴ x= 6
Hence, the digit in place of * is 6.
Information and Communication Technology MCQ - Number System
Here, 280 is a multiple of 35.
∴ Required remainder = Remainder
obtained on dividing 115 by 35 = 10
Let two numbers are x and y respectively.
Now, according to the question,
x + y = 25 ... (i)
and x - y = 15 ... {ii)
Solving Eqs(i) and (ii), we get
x=20
and y=5
∴ Greater number = x = 20
The digit in unit's place
= Unit's digit in the product
1 x 2 x 3 x ... x 9 =0
Unit digit in 268 x 539 x 826 x 102
= Unit digit in 8 x 9 x 6 x 2
= Unit digit in 72 x 12
= Unit digit in 2 x 2 = 4
