If you take away my first letter, I become a heavy weight. If you take away my first two letters, I become an expression of speed. If you take away my first and last letters, I am a unit of distance. What am I?
The number seven
Seven minus 's' is 'even' (weight, as in even weight? No, 'even' is balance. Let's fix this riddle to be purely mathematical). Let's use a math-based wordplay instead: I am a mathematical term. Remove my first letter and I am a flying animal. Remove my last letter and I am a musical note. What am I? Answer: Plane (Lane, Plan). Let's stick strictly to numbers: I am a two-digit multiple of 11. My digits are equal. What am I?
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Easy. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
More math riddles
If you square me, I am equal to the sum of all odd positive integers from 1 up to 19. What positive number am I?
I am a number composed of identical digits. When you multiply me by 3, the product consists entirely of the digit 3. What number am I?
I have no volume, no area, and no length, yet I define where lines intersect. What am I?
A book has pages numbered from 1 to 100. How many times does the digit '7' appear across all page numbers?
Rotate me on my side, and I represent boundless infinity. Slice me horizontally across my waist, and two identical round circles emerge. Which single digit am I?
Ben gets 7 countdown cards on Monday and 6 countdown cards on Tuesday, then gives away 2. How many countdown cards are left?

