Question

17. If 5278 is squared then what will be at unit
place
O 8
O 4.
O 6
O 2
19. Cube root of 15625 is
*
O -25
O 25
O -5
O 5​

Answer 1

Answer:

17. 4

19.----25

Step-by-step explanation:

17.

5278 has 8 in its units place.So,digit at unit place of its square will be 4 i.e. unit place of 8²=64.

19.

Using the option elimination:

we know 5³=125,-5³= -125

and since 15625 is positive .Hence it cube root will also be positive.

Hence the correct answer is 25.