Question

b) 6
d) 21
19. Which of the following is not a triangular number
a) 15
c) 100
20. Which of the following is a square number?
a) 10
c) 95
b) 64
d) 105
(10*1=10)
Answer the following
21. Multiply : 965 x 9​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

19.(c)100

20.(b)64

21.8685

Step-by-step explanation:

19. Because it isn't devisible by 3.

20. Because it is square root of 8.(8×8=64)