Sumwise

1605 Times (1605×) Multiplication Table

1605 times table, 1 to 20

1605 × 11,605
1605 × 23,210
1605 × 34,815
1605 × 46,420
1605 × 58,025
1605 × 69,630
1605 × 711,235
1605 × 812,840
1605 × 914,445
1605 × 1016,050
1605 × 1117,655
1605 × 1219,260
1605 × 1320,865
1605 × 1422,470
1605 × 1524,075
1605 × 1625,680
1605 × 1727,285
1605 × 1828,890
1605 × 1930,495
1605 × 2032,100

Patterns that help you remember it

  • The last digits repeat in a cycle of 2: 5, 0.
  • Every answer ends in 0 or 5.
  • Split it into tens and ones: 1605 × k = 1600 × k + 5 × k.
  • Each answer is 1605 more than the one before, so you can count on in steps of 1605.

Building it from tables you already know

To multiply 1605 by 9, multiply by 10 and take one 1605 away: 16,050 − 1605 = 14,445. To multiply by 11, multiply by 10 and add one more 1605: 16,050 + 1605 = 17,655. Multiplying by 4 is doubling twice: 1605 → 3,210 → 6,420.

Every multiple of 1605 is at least 1605, so there are none below 100 and 0 below 1,000. A number is in the 1605 times table exactly when it divides by 1605 with no remainder.

Odd, even and the last digit

Because 1605 is odd, the answers alternate between odd and even: 1605 × 1 = 1605 is odd, 1605 × 2 = 3,210 is even, and so on. Multiplying by 10 always puts a zero on the end: 1605 × 10 = 16,050, and 1605 × 100 = 160,500. Multiplying by 5 is half of multiplying by 10: half of 16,050 is 8,025.

Using the 1605 times table to divide

Every fact also works backwards: because 1605 × 7 = 11,235, you know 11,235 ÷ 1605 = 7 and 11,235 ÷ 7 = 1605. Practising the table and its division facts together halves the work.

1605 times table practice worksheet

  1. 1605 × 10 = ______
  2. 1605 × 12 = ______
  3. 1605 × 6 = ______
  4. 1605 × 10 = ______
  5. 1605 × 4 = ______
  6. 1605 × 8 = ______
  7. 1605 × 5 = ______
  8. 1605 × 11 = ______
  9. 1605 × 6 = ______
  10. 1605 × 2 = ______
  11. 1605 × 1 = ______
  12. 1605 × 1 = ______
Answer key
  1. 16,050
  2. 19,260
  3. 9,630
  4. 16,050
  5. 6,420
  6. 12,840
  7. 8,025
  8. 17,655
  9. 9,630
  10. 3,210
  11. 1,605
  12. 1,605

Word problems

Times tables are most useful when you can spot them in a question. Try these, then open each one to check:

  1. A box holds 1605 pencils. How many pencils are in 7 boxes?
    Answer7 × 1605 = 11,235 pencils.
  2. Tickets cost $1605 each. How much do 9 tickets cost?
    Answer9 × $1605 = $14,445.
  3. 12,840 chairs are set out in rows of 1605. How many rows are there?
    Answer12,840 ÷ 1605 = 8 rows.
  4. A plant grows 1605 millimetres a week. How much does it grow in 10 weeks?
    Answer10 × 1605 = 16,050 millimetres.

About this page

The table, the patterns and the practice questions are all calculated for 1605 when the page is opened, so every fact on it is exact. Use the options above the worksheet to change the number of questions or the largest multiplier.

Questions

What is 1605 × 12?

19,260.

What is half of 1605 × 8?

1605 × 8 = 12,840, and half of that is 6,420, which is 1605 × 4. Halving one factor halves the answer.

What is 1605 times 0?

0. Any number multiplied by zero is zero, because zero groups of 1605 contain nothing.

What is 1605 × 7 and 1605 × 8?

1605 × 7 = 11,235 and 1605 × 8 = 12,840. These two are the facts most people find hardest, so they are worth practising on their own.

Is 24,075 in the 1605 times table?

Yes: 24,075 ÷ 1605 = 15 with no remainder. 24,076 is not, because dividing it by 1605 leaves a remainder of 1.

How do I learn the 1605 times table quickly?

Learn it in order first, then use the patterns above and practise mixed questions; a few minutes a day works better than one long session.