Page 24 - Math_Genius_V1.0_C6_Flipbook

E:\Working\Focus_Learning\Math_Genius-6\Open_Files\01_Chapter_1\Chapter_1
\ 07-Nov-2024 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

Chapter assessment
a. Choose the correct option.

1. Which of the following is a triangular number?
(a) 5 (b) 8 (c) 10 (d) 23

2. Which of the following is not a square number?
(a) 25 (b) 81 (c) 100 (d) 32
3. Which sequence do you get by adding up centred hexagonal numbers, i.e., 1, 1 + 7, 1 + 7 + 19,
1 + 7 + 19 + 37, … ?
(a) Squares (b) Cubes

(c) Tetrahedral numbers (d) None of these
4. What will be the value of 1 + 2 + 3 + ... + 49 + 50 + 49 + ... + 3 + 2 + 1?

(a) 2500 (b) 2481 (c) 2100 (d) 2601
5. The number of diagonals in the heptagon would be:

0 diagonals 2 diagonals 5 diagonals 9 diagonals ?
(a) 14 (b) 15 (c) 16 (d) 17
B. Fill in the blanks.

1. A Fibonacci number is also known as .................... .
2. .................... is a cubic number which is also a Fibonacci number.
3. 36 is a triangular number as well as .................... .

4. The total number of squares in the given figure is 25 + ..... + ..... + ..... + ..... = .....

5. The tetrahedral numbers are the sums of the consecutive .................... numbers beginning from 1.
C. State whether the following statements are True (T) or False (F).

1. The number of little triangles in the given stacked triangle represents a triangular number.

2. In pineapples, we can find triangular numbers.
3. The Koch snowflakes is made from any type of triangle.

4. Snowflakes is an example of fractals.

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