Maths Puzzles
Puzzle 1: Boat Puzzle
Solution:
Puzzle 2: Think and Solve
Solution:
Puzzle 3: Change Positions and Add
Solution:
Puzzle 4: Code Breaker
A

B

C

D

E

F

G

H

I

J

1

2

3

4

5

6

7

8

9

10

K

L

M

N

O

P

Q

R

S

T

11

12

13

14

15

16

17

18

19

20

U

V

W

X

Y

Z

21

22

23

24

25

26

25

15

21

1

18

5

7

5

14

9

21

19

Puzzle 5: Diggy Digits
Puzzle 6: Heads over
Puzzle 7: Be Safe
Puzzle 8: Magic Triangles
Place the digits from 1 to 9 in each of the
smaller triangles of the figure without 10
repetition
so that the sum of the numbers in each of the four larger triangles is 25.
Puzzle 9: Crossword
Puzzle 1
Across:
1. The equality
of two ratios is called ________.
4. The price after
deducting discount from the marked price is called ________.
5. The interest
calculated on both the principal and the accrued interest is ________ interest.
6. If an object covers equal distances in
equal intervals of time, its speed is said to be ________.
8. Two quantities are said to vary directly if
the increase in one quantity causes the ________ in the other quantity.
Down:
2. The set from which the values of the variable are chosen is called the ________.
(Hint: two
words)
3. The set of
first components of all ordered pairs which belongs to the relation R is its
________.
7. The unique
element b of B associated with an element a of A is called the
________ of a.
Puzzle 10: Crossword Puzzle 2
Across
2.
If the edges of a cube are doubled then volume becomes ________ times.
4.
Volume and ________ are interrelated.
5.
The ________ of a solid is the measure of space occupied by that solid.
Down
1. Area of the four walls of a room
(rectangular or square) is called its ________ surface area.
3. The volume of
a cube is 4096 m^{3}, length of its side is ________.
Puzzle 10: Crossword Puzzle 3
Across
3.
It is the measurement of the space occupied by it.
4.
Volume of a cuboid = length × breadth × ________.
6.
Area of a rectangle = length × ________.
9.
Perimeter of a square = 4 × length of its ________.
Down
1. Perimeter of a rectangle = 2 ×
(________ + breadth)
2. Area of four walls of room =
________ of a floor × height of room
5. Volume of a cube = Length of an
edge to the power ________.
7. It is the measure of the region
enclosed by the boundary of a figure.
8. Surface area
of a cuboid is the sum of the areas of all its ________ rectangular faces.