Question

How many times the digit three occur in the hundreds place in the numbers between 100 and 10000. Please explain whole process.

Answer 1

First of all, isolate the numbers between 100, and 10000 where 3 appears in the hundred position:  300–399, 1300–1399, 2300–2399, 3300–3399, 4300–4399, 5300–5399, 6300–6399, 7300–7399, 8300–8399, 9300–9399.  We have 1000 numbers where 3 appears in the hundred position