Question

19. Which is the greatest three-digit perfect cube:
(a) 125
(b) 343
(c) 729
? (d) 512
20. Each prime factor appears
- times in its cube?
(2) 2
(b) 3
(c) 1 (d) 4
21. Which of the following is Hardy-Ramanujan Number?
(a) 1724 (b)1725 (c) 1727 (d) 1729
22.A cuboid has dimensions 5cm, 2cm, 5cm .How many such
cuboid will be needed to form a cube?
(2) 20
(b) 10
(c) 5
(d) 2​

Answer 1

Answer:

=(19)- C (729).

=(20)- C (1).

=(21)- D (1729).

= (22)- A (20).

MARK AS BRAINLIST

Answer 2

Step-by-step explanation:

19. (A) 125

20. (C) 1

22. (B) 10