Question

(a) Find the 8th triangular number
(b) Find the 6th square number
(b
Exercise 2.3
1. Evaluate the following by simplifying the
calculations:
(a) 4,586 +9,999 (b) 354 999
(c) 2,541 x 9,999 (d) 8,143 +9,999
(e) 14,732 - 9,999 (f) 7,853 - 998
(g) 982 +998
(h) 72 x 25
(1) 136 x 125​

Answer 1

Answer:

When we add these all together, our eighth triangular number is 36

When you multiply an integer (a “whole” number, positive, negative or zero) times itself, the resulting product is called a square number, or a perfect square or simply “a square.” So, 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, and so on, are all square numbers.

a) 14585

b) 3lakhs fifty four thousand nine hundred ninety nine

c) 25,407,459

d) 18142

e) 4733

f) 6855

g) 1980

h) 1800

i) 1700