Although it is a simple question, but the trick is to save time in solving this.
Rather than multiplying it we can do as follows:
586645 * (10000 - 1) = 5866450000 - 586645 = 5865863355
2. The greatest number by which the product of three consecutive multiples of 3 is always
54
81
162
243
Answer: Option C
Explanation:
3*6*9 = 162
3. What is the largest 4 digit number exactly divisible by 88
9900
9999
9988
9944
Answer: Option D
Explanation:
Largest 4 digit number is 9999
After doing 9999 ÷ 88 we get remainder 55
Hence largest 4 digit number exactly divisible by 88 = 9999 - 55 = 9944
4. What least number should be added to 1056, so that the sum is completely divisible by 23