An HDB flat is numbered using 4 digits: 4 thousands, 2 hundreds, 9 tens and 5 ones. The block next door has a flat number that is 300 less. What is the digit in the hundreds place of the new flat number?
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Worked Solution
Step 1: Build the original number from its place values.
4 thousands + 2 hundreds + 9 tens + 5 ones = 4 295.
Step 2: Subtract 300 from 4 295.
4 295 − 300:
Hundreds column: 2 − 3 requires borrowing from the thousands.
Borrow 1 thousand → thousands digit becomes 3, hundreds digit becomes 12.
12 − 3 = 9.
Result: 3 995.
Step 3: Identify the hundreds digit of 3 995.
Thousands: 3, Hundreds: 9, Tens: 9, Ones: 5.
Answer: The digit in the hundreds place is 9.
Correct answer: 9
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