If the unit digit in the product (459*46*28?*484) is 2, the digit in p

Question

If the unit digit in the product  (459*46*28?*484)  is 2, the digit in place of ? is:

(A) 3 
(B) 5
(C) 7 
(D) 8
(E) 9

ManyataM · Answer

The answer is option C
we will multiply the units place of all the numbers so that the resulting units place is 2
9*6 =54 .. 4 in units place
then 4*4*? =16 i.e., 6*? = 2 in units place
6*7 = 42 .. 2 is in units place

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rvcrackgmat31 · Answer

9*6*4 has 6 as unit digit 6*7 will have 2 as unit digit

Answer is C

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EgmatQuantExpert · Answer

Solution 
  Given:  
 • The unit digit in the product (459∗46∗28?∗484) is 2.

To find:  
 • The digit in place of ?

Approach and Working:   
Let the digit to be found be a.
The unit digit of the entire product = The unit digit of 9 × 6 × a × 4 =2.
 • The unit digit of 54 × a × 4 = 2
• The unit digit of 16 × a = 2
• The unit digit of 6a = 2.
 o Thus, a = 2 or 7 as 6 × 2 = 12 (unit digit of 2), and 6 × 7 = 42 (unit digit of 2).

Hence the correct answer is Option C.

Answer: C

If the unit digit in the product (4594628?*484) is 2, the digit in p

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