Question

How many numbers of the form 34a5b are divisible by 36?
A]3
B] 2
C] 5
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Answer 1

Step-by-step explanation:

since digital sum of a number divisible by 36

is equal to 9.

and even number at it's unit place.

also 0 or multiple of 4 at hundred place

(not at all, only in this case)

=> 3+4+a+5+b = 9

=> 12+a+b = 9

=> 1+2+a+b = 9

=> a+b+3 = 9

=> a+b = 6

=> (a,b) = (0,6),(4,2)

therefore four numbers are formed

(1) 34056

(3) 34452

thus option(B) 2 is correct.

Answer 2

Answer

The right answer is B 2