mscroggs
.co.uk
mscroggs
.co.uk
blog
puzzles
academic
talks
contact
subscribe
↓ ☰ ↓
subscribe
Loading image...
Advent calendar 2023
3 December
All 2023 advent puzzles
~
More information
190 is the smallest multiple of 10 whose digits add up to 10.
What is the smallest multiple of 15 whose digits add up to 15?
Show answer
Hide answer
195
.
Tags:
numbers
,
digits
,
multiples
Archive
Show me a random puzzle
Most recent collections
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
List of all puzzles
Tags
addition
dates
binary
consecutive integers
cards
square roots
tournaments
numbers grids
geometric mean
routes
probability
palindromes
surds
hexagons
ellipses
pascal's triangle
irreducible numbers
complex numbers
dodecagons
rectangles
even numbers
dice
unit fractions
logic
sets
money
indices
integration
quadrilaterals
matrices
advent
scales
odd numbers
triangle numbers
albgebra
calculus
elections
quadratics
division
sport
wordplay
trigonometry
number
taxicab geometry
coordinates
expansions
probabilty
speed
bases
crosswords
shape
floors
proportion
dominos
cryptic crossnumbers
parabolas
chocolate
differentiation
factorials
arrows
sequences
graphs
percentages
games
fractions
square numbers
range
algebra
mean
multiplication
geometry
crossnumbers
balancing
cube numbers
decahedra
spheres
digits
digital clocks
multiples
2d shapes
symmetry
rugby
3d shapes
lines
squares
numbers
square grids
products
axes
planes
consecutive numbers
median
polygons
triangles
books
determinants
the only crossnumber
averages
pentagons
volume
perfect numbers
sum to infinity
angles
gerrymandering
sums
means
coins
regular shapes
functions
tangents
geometric means
ave
digital products
medians
combinatorics
shapes
cryptic clues
clocks
partitions
folding tube maps
menace
neighbours
chess
doubling
perimeter
prime numbers
powers
colouring
polynomials
integers
remainders
area
christmas
circles
tiling
time
chalkdust crossnumber
factors
people maths
grids
cubics
star numbers
Archive
Show me a random puzzle
▼ show ▼
▲ hide ▲
Most recent collections
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
List of all puzzles
Tags
chocolate
clocks
sport
geometric means
folding tube maps
multiplication
gerrymandering
powers
menace
integration
probability
neighbours
lines
matrices
odd numbers
determinants
arrows
shapes
chess
planes
cryptic crossnumbers
the only crossnumber
2d shapes
dodecagons
expansions
functions
perimeter
time
pascal's triangle
division
tiling
circles
crossnumbers
surds
complex numbers
even numbers
polynomials
grids
cubics
3d shapes
numbers grids
polygons
squares
volume
taxicab geometry
trigonometry
books
graphs
games
palindromes
remainders
elections
quadratics
scales
differentiation
cryptic clues
geometric mean
angles
dates
triangles
consecutive numbers
logic
axes
ave
people maths
binary
number
calculus
products
cards
fractions
averages
geometry
square grids
consecutive integers
sum to infinity
dominos
sets
quadrilaterals
irreducible numbers
floors
dice
chalkdust crossnumber
square numbers
colouring
digits
tournaments
prime numbers
advent
bases
area
mean
indices
unit fractions
albgebra
christmas
shape
medians
tangents
coordinates
perfect numbers
spheres
regular shapes
wordplay
ellipses
triangle numbers
algebra
cube numbers
rugby
probabilty
rectangles
star numbers
combinatorics
partitions
routes
addition
digital products
numbers
factorials
means
balancing
median
factors
multiples
sequences
doubling
parabolas
decahedra
symmetry
integers
pentagons
coins
range
square roots
proportion
hexagons
sums
percentages
digital clocks
crosswords
money
speed
© Matthew Scroggs 2012–2025