The unit digit in 43 × 69 × 551 × 9242 is

The unit digit in 43 × 69 × 551 × 9242 is
1). 4
2). 2
3). 6
4). 8
Posted by: Created at: Last updated:
Number Systems

Answers 2

If we write all the given numbers in a form (10a + b), b will turn out to be the unit’s digit here.

So when we multiply all the given numbers, the unit’s digit in the product will be nothing but the product of all unit’s digits, irrespective of what the other digits in the number are.

3 × 9 = 27 → 7

7 × 1 = 7 → 7

7 × 2 = 14 → 4

∴ Digit at unit’s place is 4
Posted by: Created at: Last updated:
4 is the right answer
Posted by: Created at: Last updated:

Similar Questions

1 Boys and girls are sitting in a row in audience in front of a stage which faces North. Rani is fifth to the left of Sunita who is eighth to the right of Nishant. How many children are there between Rani and Nishant ? 2 A box contains 120 discs, which are numbered from 1 to 120. If one disc is drawn at random from the box, find the probability that: a) it bears a 2- digit number b) the number is a perfect square. 3 It is possible for an enable or strobe input to undergo an expansion of two or more mux ICs to the digital multiplexer with the proficiency of large number of _____. 4 A six digit number is formed by repeating a three digit number for example, 256, 256 or 678, 678 etc. Any number of this form is always exactly divisible by: 5 A researcher divides the populations into PG, graduates and 10+2 students and using the random digit table he selects some of them from each. This is technically called