Question

38. The smallest square number which is divisible by each one of the numbers 8, 9,10 is:
Gd moning eberyone
a. 2600
b.3600
c. 2900
d. 3900
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Answer 1

Answer:

financial

INCLUDING

sank & Quotation Section

ftailway Earnings Section

Ijrtintrie

Railway & Industrial Section

Bankers' Convention

Answer 2

Answer: b) 3600

Using divisiblity table we can find which No. is divisible by each of the no. i.e 8,9,10

Divisibility of 8

If the last three digits of a number are divisible by 8, then the number is completely divisible by 8.

a and b are divisible by 8   as last three digit 600/8 =75

Divisibility by 9

if the sum of digits of the number is divisible by 9, then the number itself is divisible by 9.

b and c are divisible by 9  as sum of the digits is divisible by 9

Divisibility by 10

any number whose last digit is 0, is divisible by 10.

a , b , c , d all are divisible by 10

Out of these 4  only b )3600 is divisibly by all the three i.e 8 , 9, 10