Question

By squaring the given numbers, how many zeros will be obtained?(1) 20 (2) 200 (3) 30 (4) 700

Answer 1

$(1) 20^{2} = 400 , \: that \: gives \: two \: zeroes\\ (2) 200 ^{2} = 40000 ,\: \: that \: gives \:four \: zeroes\\ (3) 30 ^{2} = 900 , \: that \: gives \: two \: zeroes \\ (4) 700 ^{2} = 490000 , \: that \: gives \: four \: zeroes$

Answer 2

Answer:

Step-by-step explanation:

By squaring the given numbers, how many zeros will be obtained?(1) 20 (2) 200 (3) 30 (4) 700

20² = 400    -  Two Zeroes

200² = 40000 - Four Zeroes

30² = 900 - Two Zeroes

700² = 49000 - Four Zeroes

Any number ending witha zero when squared the number of zeroes get doubled

if number ending with 1 zero then square will end with 2 zeroes

in number ending with 2 zeroes then square will end with 4 Zeroes