Totle #8: make 10 from 4, 7, 9, 11 and 18
Tuesday, October 20, 2026
Use all five numbers with + − × ÷ to make 10. Combine two at a time; every result has to be a positive whole number.
A Tuesday puzzle, so level 3 of 7 (they get harder from Sunday to Saturday). There were 20 different answers. Harder than 55% of all Totle puzzles, and these five numbers can make 1,018 different totals.
Playing past puzzles needs a free account. They don't count toward your streak.
How people did
On the day, 10 people played it and 7 solved it (70%).
Medals among the 7 who solved it:
How to think about it
- Work backward. Ask what two numbers make 10, then whether you can build them from what you have.
- Find the even splits. Division has to come out even, so spot the pairs that divide cleanly early.
- Make a 1 to use up a spare number. Two numbers one apart subtract to 1, and × 1 or ÷ 1 changes nothing.
- Break big numbers into tens. 7 × 16 is 70 + 42; 91 ÷ 7 is 70 ÷ 7 + 21 ÷ 7, or 10 + 3.
Hints and an answer
Tap one at a time to open it.
Hint 1: think about the target
The last move makes 10. It can add or subtract two numbers you've built, multiply two (10 = 2 × 5), or divide a multiple of 10 by the right number (20 ÷ 2, 30 ÷ 3, 40 ÷ 4…). Look at the numbers you have: which of those could you build?
Hint 2: a first move
Try 4 + 7 = 11.
Hint 3: how it ends
The last move is 18 − 8 = 10. So the job is building 18 and 8 from the numbers.
Show an answer
- 4 + 7 = 11
- 11 ÷ 11 = 1
- 9 − 1 = 8
- 18 − 8 = 10
One of 20 different answers.