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
perfect numbers
routes
books
products
functions
square roots
cryptic clues
floors
grids
speed
sport
palindromes
surds
determinants
symmetry
probability
decahedra
odd numbers
partitions
triangles
combinatorics
square numbers
lines
mean
parabolas
geometry
scales
means
tournaments
arrows
angles
digital clocks
sums
coordinates
christmas
cryptic crossnumbers
tangents
pentagons
integration
irreducible numbers
cube numbers
time
crossnumbers
crossnumber
tiling
hexagons
squares
ellipses
numbers
colouring
quadrilaterals
differentiation
number
sets
neighbours
cards
polygons
powers
unit fractions
folding tube maps
wordplay
multiples
probabilty
volume
matrices
complex numbers
sequences
consecutive numbers
expansions
cubics
money
planes
axes
averages
coins
spheres
shapes
circles
calculus
dates
dice
star numbers
fractions
games
3d shapes
median
indices
the only crossnumber
taxicab geometry
percentages
polynomials
sum to infinity
chalkdust crossnumber
addition
digits
balancing
people maths
shape
even numbers
factors
numbers grids
dominos
consecutive integers
digital products
division
gerrymandering
2d shapes
remainders
bases
medians
logic
chess
area
advent
binary
crosswords
algebra
prime numbers
trigonometry
factorials
integers
perimeter
menace
geometric mean
multiplication
quadratics
proportion
albgebra
graphs
clocks
geometric means
rugby
ave
range
elections
pascal's triangle
triangle numbers
dodecagons
square grids
rectangles
regular shapes
doubling
chocolate
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
unit fractions
games
wordplay
integration
pentagons
percentages
ave
cubics
square grids
consecutive numbers
sets
clocks
quadratics
median
menace
logic
crossnumber
averages
indices
2d shapes
circles
cube numbers
odd numbers
functions
squares
3d shapes
tangents
geometry
addition
scales
hexagons
expansions
doubling
fractions
elections
albgebra
prime numbers
powers
numbers
spheres
speed
remainders
balancing
division
tiling
combinatorics
integers
chalkdust crossnumber
number
christmas
planes
the only crossnumber
geometric mean
coins
triangles
determinants
lines
matrices
crosswords
partitions
even numbers
volume
binary
tournaments
factors
perfect numbers
decahedra
chess
triangle numbers
crossnumbers
rectangles
advent
dominos
probabilty
shapes
time
axes
area
means
cryptic clues
grids
people maths
star numbers
multiplication
dates
consecutive integers
folding tube maps
neighbours
range
sport
multiples
cards
products
polynomials
money
gerrymandering
surds
trigonometry
chocolate
polygons
proportion
complex numbers
parabolas
coordinates
routes
irreducible numbers
probability
digits
palindromes
bases
digital products
regular shapes
square roots
symmetry
graphs
digital clocks
calculus
medians
floors
numbers grids
mean
factorials
differentiation
arrows
geometric means
angles
perimeter
quadrilaterals
sums
rugby
colouring
dice
ellipses
pascal's triangle
sequences
square numbers
shape
algebra
taxicab geometry
books
dodecagons
sum to infinity
cryptic crossnumbers
© Matthew Scroggs 2012–2025