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Introduction to Square Numbers

Find the sum ...

Question

Find the sum of first three odd triangular numbers.

A. 16

B. 21

C. 19

D. 17

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Solution

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Q. Mark the correct alternative in the following question:

The sum of two consecutive odd numbers is 36. The larger number is

(a) 17 (b) 15 (c) 19 (d) 21

Q. Find the sum of first three odd triangular numbers.

Q. The sum of first 11 consecutive odd numbers is 121. What will be the sum 13 + 15 + 17 + 19 + 21 ?

Q. Find the sum of the first three even triangular numbers.

Q. Represent the following data in the form of a frequency distribution table :
16, 17, 21, 20, 16, 20, 16, 18,17, 21, 17, 18, 19, 17, 15, 15,
19, 19, 18, 17, 17, 15, 15, 16, 17, 17, 19, 18, 17, 16, 15, 20, 16, 17, 19, 18, 19, 16, 21, and 17.

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